Solar rope lighting is useful and decorative. You may just string some along a pathway, or the edge of your swimming pool. And that would be sufficient, until you think of other uses for it. Maybe you’ll go a little overboard and cover your entire house with it during the holidays. Really, you could do whatever your heart desires, but before you do, there’s some things about solar rope lighting that you should know.

First of all, what are solar rope lights, anyway?

Solar rope lighting is a woven strand of Light-Emitting Diodes (LEDs). It is then encased in clear plastic, to protect the LEDs. This also enables you to wrap the lights around a pole, or lay them in straight lines. A small solar collector is attached to the LEDs. During the day, the solar collector charges a small, rechargeable battery that powers the LEDs. It’s important during the day that your solar collector get enough light, or else you’ll get no light or dim light at night. A light sensor determines when light is low enough to turn your lights on. Solar rope lights comes in white, or a single color, or, festively, many colors. You can get a woven strand of LEDs, or a strand with individual lights (like holiday lights).

CC flickr photo courtesy of Robert Hruzek

The uses don’t end with your backyard either — you could take a strand camping, use it on your boat, or as a nightlight for your child (if you’re using it indoors, the solar collector has to be placed in a sunny window).

Solar-powered rope lights are largely water-resistant and reasonably durable. They can be left outside, but be careful not to run the over with your lawnmower or car. You need no electrical know-how to install them, as they are self-contained — just place them where you’d like them. If you have multiple strands, you can plug one into the end of another.

By using solar power, you also reduce your carbon footprint, as well as your electric bills.

Where to Buy Solar Rope Lights

Amazon.com – Has a wide variety of solar lights, including programmable multicolor lights. Enough to comparison shop.

Sears – Sells solar LED strands or rope LEDs in a variety of colors.

Clean-energies.org – A small retailer offering a variety of solar lighting options, including solar strands of individual LEDs (like Christmas lights), in white or colored lights such as green, red, blue at lengths of 50 or 102 lights.

Smarthome.com – Sells Flipo Solar LED rope lights. 39 feet for $37.

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If you like entertaining in your garden at night, or don’t want to step on your flowers in the dark, and you crave sustainable energy in solving this problem, you need to consider solar LED garden lights.

CC flickr photo courtesy of lozwilkes

Solar lights for gardens come in a variety of styles:

• stake lights

• hanging lights

• rope lights

• spotlights

• pond lights

Solar LED garden lights are like any light that you’d use around your yard. The exception being that instead of being plugged into the power grid, they are hooked up to solar collectors, usually mounted around the light itself, that charge small batteries which power the lights. They also use light sensors to determine when it’s dark enough for the lights to come on.

Stake lights are mounted on a stake which can be driven into the earth. Stake lights can be placed around pathways, or near boundaries. Many retailers carry solar stake lights. Amazon.com carries a set of 12 for $39, by Brinkmann, that offer a clean design and are typical of the style. For the more whimsical among us, they also sell stake lights that are accented with butterflies, angels, or roses.

Solar spotlights are directional lights that you can point to a particularly scenic part of your garden, like a sculpture or a nice rock, or at some sort of obstacle, like the edge of a small pond. Spotlights will usually have the highest wattage bulbs and larger solar collectors, because they are a directional light. Smart Solar makes a collector with ten LED lights with replaceable batteries. You can find it at Outdora.com.

Rope lights are a strand of LEDs woven together and encased in plastic. You can use them to create curves, a nice accent in any garden. Pond lights are floating lights that can be used to light up a pond or swimming pool.

Advantages of Solar-Powered Garden Lights:

• No wiring. You don’t have to be an electrician to install them. Many have no power cords and those that do will simply plug into a separate solar collector.

• A sustainable, environmentally-friendly lighting solution.

Disadvantages

• Lights can shine dimly if not enough of the sun’s light is captured. Many varieties of solar garden light have small solar collectors and low-watt bulbs. There are exceptions. Consider your needs and the performance of the product your looking at. Not all lights are equal.

There are online retailers that specialize in selling solar garden lights. Major retailers such as Amazon.com, Sears and Newegg.com carry them as well.

Other solar LED garden light options include step lights (that sit on the edge of your steps) and stepping-stone lights (that are strong enough that you can actually walk on them). There are also hanging lights that suspend from stakes like lanterns, or that can be mounted on a wall.

Tips for Solar Lights for Gardens

• All solar lights require sunlight to charge. If you place your lights in shade, or experience cloudy weather, this will have an impact on the performance of your light, as solar garden lights have simple batteries and collectors. Choose lights with detached solar panels you can place in an area of full sun, if you plan to place those lights in a partial-sun or shaded area.

• Dust and particulate matter can also build up on your solar collectors, making them less effective, so remember to clean them occasionally.

• Also, all batteries degrade over time. Choose lights with removable rechargeable batteries give you the option to replace batteries.

• Some lights can’t be left outside during winter, as their batteries aren’t meant to handle cold temperatures. Be sure to read any materials concerning maintenance when you buy your solar garden lights.

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Photo via CNET.

Like many people, I just started hearing about the Bloom Box from Bloom Energy. It isn’t the first time that 60 Minutes has come up with a story about some type of miraculous energy source that seems too good to be true.

Indeed, free energy scams are as old as energy itself!

But here’s why the Bloom Box isn’t actually a scam. It doesn’t ever claim to be a device that creates free energy. It’s just a fuel cell device that makes ultra efficient use of methane or natural gas to generate electricity cheaper and cleaner than buying it from the grid.

And look who is actually using these devices right now:

http://www.bloomenergy.com/customers/

Wal-Mart, Bank of America, Google, Staples, Ebay, FedEx and others. These are real companies, using a real, functioning device.

Makes you wonder things like, how well would it run on propane? Could you power an entire house off the grid? And how long would the propane last?

Would it be cheaper and/or cleaner if you have a natural gas hookup at your home to use a Bloom Box to generate your electricity instead of getting it from the grid?

How much will they cost for one suitable for a house? What will the payback time be in years?

Want to learn more about the Bloom Box?

The Bloom Energy official web site is starting to offer more details about the device, now that they are actively seeking out media coverage.

CBS 60 Minutes had a segment about the Bloom Box.

CNET has also been covering the Bloom Box, and even live blogged one of their media events.

Readers, do you have anything interesting to say about the Bloom Box?

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Photo courtesy of natashalcd at Flickr.com

The jury is still out on the Cash for Clunkers program. The last paperwork was filed on Monday, August 24, 2009, but crushed cars still waiting to be recycled. The final numbers are in – so how did the program score?

All told, C4C took 690,114 clunkers off of the road:

84 percent of consumers traded in trucks and 59 percent purchased passenger cars. The average fuel economy of the vehicles traded in was 15.8 miles per gallon and the average fuel economy of vehicles purchased is 24.9 mpg. – a 58 percent improvement.

That sounds wonderful, but a lot of people are wondering how effective C4C really was. Some argue that the program was a handout to car makers, that it was economically ineffective, that it increased consumer debt, or that it will create a price bubble for used cars.

There’s some truth in each of these claims, and policy makers are hopefully taking notes. Cash for Clunkers generated a lot of strong emotions. Even among environmentalists, there was spirited debate over the program. For example, ethanol lobbyists and wind turbine manufacturers opposed the program because it threatened their funding.

Photo courtesy of cluestream at Flickr.com

The Federal Cash For Clunkers program is also being blamed for distorting the value of carbon credits. Depending on the vehicles involved in the trade, the government set a carbon price of between $237 and $500 per ton. That compares with an average price of $5 to $40 per ton for carbon credits available on the open market.

Critics have argued that the low fuel efficiency requirements for replacement cars will have minimal impacts over the long term. Under the program, some trucks were replaced with other trucks that “only” received a 2 mpg improvement (18 mpg –> 20 mpg). That is more than a 10% improvement – and improving the mileage of a work truck has a much larger impact than improving the mileage of an economy car.

Photo courtesy of shimonkey at Flickr.com

One of the strongest arguments about C4C is that the environmental impact of making new cars may be greater than the benefits provided by improved fuel efficiency. Mining ore, molding rubber, welding parts, and moving the finished product to showrooms are all processes that produce carbon emissions:

The amount of carbon dioxide (CO2) emitted to produce a new car has been estimated to range from about 3.5 to 12.5 tons, or an average of about 6.7 tons. So buying a new car means an extra 6.7 tons of CO2 emissions — you wouldn’t have emitted all that pollution had you just kept your old car.

Yet, the bulk of CO2 that a car releases comes from day to day operation:

According to a literature review by the Pacific Institute, somewhere between 10 and 20 percent of the life-cycle carbon emissions of the average car come not from driving but from manufacturing and disposal.

The other 80-90% comes from driving. It doesn’t take a large increase in efficiency to make up for the carbon released in making a new vehicle.

So, is it worthwhile to replace the less fuel efficient cars with fuel sipping models? Does it produce more pollution to build the vehicles than it takes to operate older, less efficient engines? Setting up a formula is pretty simple – let’s say the 690,114 cars produced for C4C released average amounts of carbon dioxide. 690,114 x 6.7 tons = 4,623,763.8 tons of CO2. That’s how much Cash For Clunkers caused to be released.

On the other side of the equation is how much CO2 saved by getting gas guzzlers off of the road. The average American drives more than 13,000 miles per year. The vehicles that were replaced would have burned approximately 596,511,828 gallons of gasoline per year ((13,657 miles x 690,114 cars) / 15.8 mpg). The replacement cars would only burn 378,509,513 gallons ((13,657 miles x 690,114 cars) / 24.9 mpg). That’s 218,002,315 gallons saved per year.

Each gallon of gasoline that’s burned produces about 19.4 lbs of CO2. 19.4 lbs of CO2 is ~0.008799692 metric tons.

So, after all that math, C4C is currently reducing our CO2 emissions by approximately 1,918,353 tons per year. In less than 2 and a half years, the program will “pay” for itself in terms of CO2. The average passenger car is driven for 7 years or more, so over their lifetime, Cash For Clunkers vehicles will save approximately 13,428,471 tons of Carbon Dioxide.

With numbers this large, sometimes it helps to put them in perspective. A large elephant weighs approximately 6 tons, so 13,428,471 tons of carbon weighs more than 2 million elephants!

Photo courtesy of ECU Digital Collections at Flickr.com

CO2 isn’t the only pollutant that the program has reduced. It isn’t even the type of emission that new cars have the greatest impact on:

Older vehicles emit conventional air-pollutants, such as nitrogen oxide and sulfur dioxide, at rates as much as 100 times higher than newer vehicles, he says. That’s because they have less-sophisticated pollution controls and because emission levels tend to worsen as vehicles age.

Most of the greenhouse gas released in the US comes from other sources. We cause more pollution with coal power plants, oil refining, chemical extraction, and other industrial processes. So, the Cash For Clunkers reductions are really just a drop in the bucket:

…on average, every hour, America emits 728,000 tons of carbon dioxide. The total savings per year from cash for clunkers translates to about 57 minutes of America’s output of the chief greenhouse gas.

Cash for Clunkers isn’t going to solve our emissions problem. But it’s a start.

As a side note – $2B of funds were added to extend the Cash For Clunkers program. Unfortunately, those funds were taken from the $6B set aside for other green technology. This means that there will be less investment in wind turbines, energy efficiency upgrades, power storing devices, smart grids, and other uses that may have delivered more of an environmentally friendly bang-for-the-buck.

There are also plans to mirror the program with rebates for energy efficient appliances.

Photo courtesy of Uncle Bumpy at Flickr.com

What do you think about Cash For Clunkers? Would the money have been better spent on public transportation, alternative energy generation, research, or other uses? Please share your thoughts in the comments section below.

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Photo courtesy of naturalturn at Flickr.com

Over time, solar panels will get covered with dust, grime, and even bird droppings. These obstructions block sunlight and will reduce power production. The solution is simple though – clean your solar panel when it gets dirty!

Each solar panel is different, so make sure to review the instructions from the manufacturer before cleaning the panel. Some panels are sensitive to certain chemicals, and others may have fragile components that you should be aware of. So, read those manuals first.

If your panel is a standard design, then cleaning a solar panel is just like cleaning a window. The “live” electrical components are isolated behind glass or plastic shielding, and all that needs to be cleaned is the outside. Before washing the glass, make sure that there aren’t any cracks or loose wiring. If there are, it might be a good idea to call a technician instead!

Here are the supplies you’ll need:

Green cleaning supplies do a great job on glass and solar panels. There are several varieties of streak free glass cleaner available commercially. You can also cook up non-toxic cleaning solution at home. Here’s a simple recipe for eco-friendly glass cleaner:

Make a great all-purpose window cleaner by combining 1/4 cup vinegar, 1/2 teaspoon liquid soap or detergent, and 2 cups of water in a spray bottle.

Use the soapy water to wash the surface of the solar panels, and brush away any visible dust or streaks. Gentle scrubbing may be necessary. After wiping away dirt, it’s a good idea to dry the panels off. Dissolved grime has a tendency to move around rather than wash away. Wiping up the wet areas does a thorough job of removing all of the silt and it also prevents water spots.

That’s it! Compare the output of your solar panels before and after cleaning. When output starts to fall again, it’s probably time for another quick rinse.

Photo courtesy of bkusler at Flickr.com

For solar panels in hard to reach areas (ie; on the roof of an isolated lighthouse or attached to a satellite in space) automatic cleaning systems are a popular option. Most of these automatic systems work like windshield wipers, brushing dust away from the solar panels with a spray hose and mechanical arm. Automatic cleaning devices add a little bit of cost to a solar panel system, but they may be worthwhile in dirty or hazardous settings.

Just a side note – roof mounted solar panels are sometimes laid out to be self cleaning. There’s less need to clean a solar panel if it isn’t dirty!

Interested in building your own solar panels to save money? Check this out.

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This year, June 15th was “Ride Your Bike to Work” day. When I saw other people riding to work, I decided to give it a try.

Photo courtesy of sportpictures at Flickr.com

This is remarkable because my bike has been quietly stashed in my garage since last Christmas (when I received it as a gift). I took the bike out for a few spins, but the two of us had an understanding. If I kept it safely stored away, it wouldn’t try to buck and throw me over the handle bars.

Before June 16th, I had never ridden more than 5 miles in a day in my entire life. I’m not your typical bike rider – I’m 20 pounds overweight, I’ve never tried an “extreme” sport, and I live in one of the hottest cities of the Southwest. So, if I can commute to work on a bicycle, anyone can.

Have you considered riding a bike instead of taking your car? It’s a great way to save gas while burning calories and getting more time outdoors in the fresh air. Bicycling can help you be more productive by reducing blood pressure, stimulating serotonin, and helping you arrive at the office fully awake. Bike riders also stand out for promotion – if you’re having trouble catching the attention of management or just want to be known for your dedication, riding a bike is a great way to climb the corporate ladder.

There are some hurdles to commuting by bike. If you’re not a dedicated bike rider, these hurdles can seem impossible to overcome, but I’ve found out that there’s no reason to let fear or uncertainty keep you stuck in traffic.

Photo courtesy of StewBl@ck at Flickr.com

Distance

For most people, distance is really a question about endurance. How far can you comfortably ride on a bicycle? It takes a lot more energy to pedal a bike than it does to press the gas pedal on a car. But it can be less draining that driving a car while giving other drivers the finger and shouting loudly (you know, the typical American commute).

Everyone has a different comfort level. For most people, a 1 mile commute is going to be a breeze, a 3 mile commute is going to be exercise, and a 5 mile commute is going to be painful (but doable). If you live further from work than 5 miles, you may want to consider multi-modal cycling. That means riding a bicycle part of the way, and using a bus or train to cover the rest of the distance. If you have a folding bike or large car, you can also take a multi modal route by using a parking garage along the way.

The best way to calculate distance is to use one of the free online mapping services. Mapquest, Google Maps, and Yahoo maps can all be used to find the shortest routes between two points, and it’s easy to avoid highways or other danger zones by altering the route. Online maps are easy to use, and in some areas they even offer real-time traffic reports along your route (that’s handy to check before you hit the road). Here are a few other things to consider when choosing a bike route.

These maps do have one weakness though – they’re primarily set up for roads. Bike trails, parks, and paths are invisible to the software, so the routes they recommend may be longer and more dangerous than they should be. That may change soon (for example, Google recently rolled out a “pedestrian” route option that can map pathways and sidewalks), but until it does, you may want to check out other routing tools such as Bikely.com.

Photo courtesy of kansasliberal at Flickr.com

Safety

Safety is a major concern for urban cyclists. Not only are we at risk from vehicles that we share the road with, but bicyclists are also exposed to street crime and muggers. It’s important to exercise high situational awareness at all times – that is, pay attention to what’s going on around you. Keeping eyes open and looking out for trouble can prevent risks from turning into injuries.

First things first – bicycling is not as risky as you may think. Per mile, pedestrians are more than twice as likely to be injured than cyclists. Motorcyclists and drivers on the freeway also have higher rates of serious injury. Believe it or not, the more bicyclists there are, the safer bicycling becomes.

That doesn’t mean bicycling is a risk free mode of transportation. The first car accident in American history took place between a car and a bicycle – and it killed the biker. Every year, 600 to 800 cyclists are killed in America. Those death rates are among the highest in any developed country. To avoid becoming a statistic, it’s important to follow a few basic cycling safety guidelines:

1) Always wear a helmet. 75% of all deaths on bicycles occur from head trauma, and many injuries can be prevented or reduced in severity.

2) Ride with the flow of traffic – it’s much safer to go the same direction as cars in your lane. A case study in Washington found that many fatal bike accidents involved cyclists riding in the wrong direction, where head-on collisions are much more likely to cause serious injury.

3) Yield when entering a road. Bicycles have less visibility than cars – it’s important to follow the law and behave just like a car, but it’s safe to act under the assumption that other drivers don’t see you.

4) Check over your shoulder when merging lanes. Even if you use hand signals, signaling does not give you the right of way. Cars behind you may not see a gesture, but it’s easy to spot an oncoming car.

5) Stay in the proper lane. If you’re turning left at an intersection, don’t try to turn from the right lane. Yielding the high speed lanes to cars is a common mistake of beginners: instead, always go to the proper lane for your path of travel.

6) Stay visible at all times. Wear bright clothing, use reflectors and headlights at night, and avoid riding in the blind spots of cars or other bikers.

7) Maintain your equipment. Make sure your brakes are in working order, and that your tires are properly inflated.

It’s important to find a route where your nerves are steady. If you’re uncomfortable around traffic, that can cloud your reaction times and make you more accident prone. There’s no need to ride like an adrenaline junkie to make your way in to work.

In many cities, there are bike lanes and bike paths that insulate riders from the flow of motor vehicles. While some cyclists disagree about the wisdom of building these features (some cyclists feel that bike paths reduce attentiveness to the road and some riders consider bike paths a form of segregation) but the number of paths is steadily increasing. However you feel about the situation, it’s important to find a route that you’re comfortable with.

Photo courtesy of jesse! at Flickr.com

Cost

Compared to a car, riding and operating a bike is cheap. You only need a bike and a safety helmet (both of which can be rented if you want to try before you buy). It can cost less than $250 to get all of the tools you need, although it’s also easy to spend more than $5,000 getting top of the line gear.

There are plenty of bicycles available at all price levels. For a commute to work, just about any bike will do. Whether you prefer a road bike, a racing bike, a mountain bike, a commuter bike, a recumbent bike, or any other style, there are many choices available in all price ranges.

Other supplies you might want to consider include biking gloves (to reduce pressure on your palms), sunscreen, exercise clothing, headlights, reflectors, blinking tail lights, a bell or horn, and a hydration backpack. In my opinion, biking gloves and comfortable clothes are one of the best investments you can make. I’ve also found that a chilled hydration pack really helps if you’re riding in triple digit weather. Oh, and good footwear also matters – you probably don’t want to bike around in sandals or high heels.

Riding a bicycle can save you money in the long term. Bike riders will generally enjoy reduced healthcare costs and fewer sick days. Contact your insurer or HR department, and ask if there’s a discount or incentive available. Healthy living programs sometimes offer reimbursement for equipment, promotional pricing on gear, and other perks. In 2009, there’s even a Federal Tax Benefit available for cyclists – you can get $20 of your monthly paycheck declared tax free:

Spearheading the campaign for a bike commuter bill was Democratic Rep. Earl Blumenauer of Oregon. “We have legislation that is designed to promote cycling and to provide a little equity for the people who burn calories instead of fossil fuel,” he says.

Photo courtesy of sportpictures at Flickr.com

Work appropriate clothing

The clothes we wear when cycling probably aren’t very well suited for work in a cubicle. Loose fitting shirts and shorts are ideal for biking, but even if your job has a casual dress code, it’s a good idea to change out of sweaty clothes. An easy way to have the best of both worlds is to bring a change of clothes with you.

If your job has a locker room, changing clothes is easy. If not, consider using the break room, gym, closet, or even the bathroom. Don’t be afraid to think outside of the box – Superman used a phone booth for crying out loud.

If changing isn’t an option, you can also bring clothes to put on over your workout clothes. Bike in an undershirt, and then put a dress shirt and jacket over the undershirt. Bring a hat to cover helmet hair, or dress pants to put on over biking shorts. Or, you could change your standard of “work appropriate” clothing.

Photo courtesy of 5150fantast at Flickr.com

If you’re a manager and would like to encourage workers to start riding bikes, here’s a great bullet point list of ways to build a bike friendly workplace.

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Photo courtesy of Army.mil at Flickr.com

When you think of environmentally friendly groups, Greenpeace, REI, the Sierra Club, New Belgium Brewery, and Seventh Generation are some of the green companies and organizations that are likely to come to mind. But what about the US military?

The armed forces are surprisingly green. For example, the Air Force is the third largest buyer of alternative energy in the US. The US Army is also rapidly seeking energy alternatives. Officers are trying to adopt solar, wind, and bio-diesel energy sources to reduce logistics problems and conserve resources:

The effort will have to be really serious, as their energy costs have increased a full 40% during the last seven years, even while they have cut consumption by almost 8%. According to their latest numbers released this week in Washington, D.C., right now they are spending $2 billion on fuel every year.

Reducing energy use in Iraq and Afghanistan is a top priority. By reducing the need for fuel convoys, energy efficiency reduces exposure to IEDs. It also protects soldiers from toxic emissions that come along with diesel generators. In recent years, the focus on energy conservation has really started to pay off.

That’s all well and good, but helping the environment is clearly a fringe benefit for most military planners. There are signs that a green culture is growing within the armed forces though. Several branches of the military are working to reduce the use of toxic chemicals in everything from paint and electronics to fuel and explosives. For example, the US Navy is testing lead-free bullets.

If these bismuth alloy bullets perform as expected, there’s a good chance that shooting ranges will soon be lead free. Cleaning up lead is a huge expense, and lead dust is a major health danger that affects cleaning crews at every gun range. Also, lead can leak into groundwater from outdoor berms and harm the environment.

In recent years, environmental activists have also been successful in forcing the military to adopt several earth friendly policies. Protesters are increasingly likely to raise environmental issues. While the supreme court rejected arguments against the use of high intensity sonar, other efforts have resulted in legislation prohibiting sewage release in the ocean and disposal of toxic paints in furnaces. Due to environmental concerns, the US Marines are currently looking for eco-friendly ways to dispose of toxic ordinance and recycling mothballed equipment.

Photo courtesy of ScottPartee at Flickr.com

Activists are crucial to enacting change – just look at Vieques. Vieques is a small island in Puerto Rico and the area was used as a naval firing range for most of the 20th century. After decades of public outcry, the Navy was forced to stop using Vieques as an ordinance testing ground.

There is a surprising twist to the story. Due to the Navy’s use of the island, Vieques has higher biodiversity than many surrounding areas. The firing range prevented development while most of the Caribbean was covered in resorts and boardwalks. Believe it or not, firing high explosive at wildlife is less destructive than building permanent structures. As a result, Vieques is currently booming as an eco-tourist destination.

The military still has quite a ways to go, but there are encouraging signs that the armed forces are becoming much better stewards of the planet.

Photo courtesy of Brent and MariLynn at Flickr.com

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Photo courtesy of London Permaculture

Under new Federal laws, you can get tax credits for 30% of most solar panel installations. Some states have additional incentives, and many utilities are also encouraging customers to install solar panels so that they don’t have to build new coal power plants.

Even with these incentives, photovoltaic panels are pricey. In these tough economic times, it’s important to remember that there are many other ways to take advantage of energy from the sun. Here are a few low-cost options:

Install a solar water heater – Passive solar systems cost a fraction of what solar panels cost and they are much more efficient at heating water (because they generate heat directly, without the need for inverters or battery storage of energy). Solar water heaters are also eligible for a 30% tax credit, the same amount that photovoltaic panels can earn. There are many different designs for solar water heaters, and some are more suitable for different parts of the country.

Use a clothesline – For the cost of a sturdy rope and some clothespins, you can unplug your electric clothes dryer. Even on a cool day, a gentle breeze will suck the moisture out of clothes. Clothes that are dried on a clothesline last longer (there’s less wear and tear from tumbling in the dryer), they smell better, and they’re naturally sterilized by UV light from the sun. Switching to a clothesline can cut your electric bill by 10-15%.

Turn out the lights – When the sun is shining, there’s no reason to keep the curtains closed. Instead of using a couple of hundred watts of electricity to power lightbulbs, turn off those lights and let the sunlight in! If Peeping Toms are a worry in your neighborhood, install slats or polarized window coverings for privacy. These window treatments will also filter out UV light and reduce carpet fading. Or, you can plant a window box full of kitchen herbs and obscure the view with tall plants while still letting in natural light.

Build to take advantage of the sun – When drawing blueprints or choosing a place to live, remember that a building’s layout can make a major difference in the amount of air conditioning and heating that’s needed. One thing to consider is orientation – building short walls on the east and west sides reduces the surface area that’s exposed to early morning and late evening sunlight. Another thing to consider is solar massing – using thick, heat absorbent materials like adobe can insulate a building against hot weather during the day and cold weather during the night, cutting heating costs by up to 65%.

Use trees – Trees provide wonderful natural shade, and they also capture solar energy the old fashioned way, by converting sunshine into firewood. Tree choices can also complement the way that buildings capture sunlight in the winter and block sunlight in the summer. One popular landscaping choice is to plant deciduous trees on the east and west sides of a building. That way, the leafy trees block sunlight in the summer (when leaves are full) and let sunlight through in the winter (after the leaves fall off).

Try a solar cooker – Sunlight is a great way to boil water and cook food. It’s easy to focus sunshine with collectors, and simple solar cookers can be made for less than $15 using just about anything and aluminum foil. Here are instructions for making a solar cooker out of a used pizza box. There are compact solar cookers tailor made for camping and larger models suitable for crock pot cooking.

In many developing countries and off-grid locations, solar cookers are reducing indoor air pollution by replacing firewood, charcoal, propane, and other fuel sources. These solar cookers can save thousands of lives each year, while also reducing deforestation and reducing conflict over limited resources. Since sunlight is free, solar cookers drastically cut the cost of boiling water for sanitation purposes. If you want to take advantage of sunlight without buying a solar panel, here’s a great recipe for Solar Baked Brownies!

Photo courtesy of AIDG

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Photo courtesy of WallyG at Flickr.com

Here at the Practical Environmentalist, we’re green news junkies. We keep an eagle eye out for the latest science, social, and environmental developments and try to sum up the big picture. A lot of exciting things are going on right now, with recent legislation leading the way.

Many gardeners, ranchers, and farmers are concerned about a Food Safety Bill that’s pending in the House. There have been rumors that this legislation would redefine the word “organic”, or outlaw small scale farms, or make it impossible to grow heirloom seeds, or drive up the price of locally grown food. HR 875 has been the subject of message board arguments, blog punditry, and even chain mail. Before you call your Congressman and voice concerns, it’s important to do some fact checking about HR 875.

There’s also some interesting news about ethanol and biofuels production. The percentage of ethanol in gasoline is currently capped at 10% (E10), but Ag Secretary Vilsak is urging lawmakers to raise the amount of ethanol that’s allowed in transportation fuel. He’s calling for E12 gasoline, and we may see 15-20% ratios if the Environmental Protection Agency approves E15 or E20 gasoline. This move face opposition from equipment manufacturers who are worried that high ethanol blends may harm engines. Lawnmower and boat engines are particularly at risk.

Several states are making green news too. Michigan is offering scholarships to train unemployed and underemployed workers for green collar jobs – these Michigan Promise scholarships may help the state survive waves of layoffs in the automotive sector. The funds come from Tobacco settlements and are not at risk from the declining tax base in the state.

Illinois, California, Texas and other states are rushing to build transmission lines that will carry wind generated electricity from the countryside into the big city. A recently proposed line called the Green Power Express would run from the Dakotas into Chicago. This is one of many infrastructure projects that could pay dividends in reducing pollution and reducing dependence on foreign energy sources at the same time.

Private enterprise is also partnering with city and state governments to encourage energy saving projects. “Green Mortgage” programs allow homeowners to take advantage of the tax break on mortgage interest to finance energy saving additions and renovations to their homes. These programs will funnel money towards installing insulation and energy efficient windows, or replacing light bulbs with skylights and upgrading Energy Star appliances. In the process, they will generate manufacturing and construction jobs now while boosting energy efficiency of homes for decades to come.

Do you know of any other big green news? Feel free to share in the comments section below!

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Photo courtesy of Saw You On The Flipside

For some people, travel is an unpleasant necessity. They travel to meet clients or commute. For other people, travel is a joy and the reason that they work. They save up money for vacations and sight seeing. Whether you’re in a hurry to get home or if you’re taking the chance to satisfy your wanderlust, there are plenty of opportunities to add some green to your itinerary.

From hiking boots to luxury jets, we have more transportation options today than ever before. Most travelers weigh these options based on comfort, price, and time. Yet an increasing number of adventurers and businesswomen are factoring in the environmental impact before they buy tickets.

When choosing transportation with a small carbon footprint, it’s important to compare apples to apples. One way to compare the environmental impact is using passenger miles. Passenger miles are calculated by taking the total fuel consumed and dividing by the number of passengers. For example, consider a car that gets 40 miles per gallon. If the driver is the only person in the car, then the driver is responsible for 19.4 pounds of CO2 for every 40 miles driven or 0.485 pounds per mile (19.4 / 40).

If we add a passenger with heavy bags, the car’s MPG will decrease slightly to about 39 MPG, but the amount of carbon dioxide generated will stay roughly the same. That footprint is spread out over 2 people instead of one. (19.4 / 2) / 39 = 0.249 pounds per mile. This is because so much of the energy used in moving a car is used to move the car itself.

In short, vehicles that travel full are more fuel efficient than empty vehicles, and passenger load can greatly affect the pollution produced per person. While trains are often more carbon efficient than buses, a fully loaded passenger bus may even be more efficient than a train. Then again, rail systems in some countries have the edge.

The most common way to compare different fuel sources is to use Miles Per Gallon equivalence (MPGe), but some fuel sources are dirtier than others. For example, generating 100,000 British Thermal Units (BTU) from coal will produce about 42 lbs of CO2, while natural gas will produce the same amount of energy while emitting about 14 lbs of CO2. So, a coal powered train may be more energy efficient than a natural gas powered bus, but it would produce more pollution to travel the same distance. Hard numbers for this “pollution efficiency” are difficult to pin down.

And that’s not all… some situations can magnify the effect of emissions. For example, pollution from airplanes is released in the upper atmosphere. Carbon dioxide, nitrogen oxide, water vapor and other byproducts behave differently in the upper atmosphere than they do at ground level, multiplying their effects. For more information on this subject, look at how various scientists calculate the radiative forcing factor. As a rule of thumb, each pound of airplane emissions is about 2.8 times worse than emissions from other forms of transportation.

From lowest impact to highest impact, here is a rough guide to transportation options (including some data from the US Department of Energy Transportation Energy Data Book and manufacturer’s sites):

On foot / Walking
Bicycle
Horseback Riding
Rickshaw
Electric Motorcycle / Scooter
Vanpool or Shuttle (1,322 BTU per passenger mile)
Motorcycle (1,855 BTU per passenger mile)
Train (2,816 BTU per passenger mile)
Ultra Efficient Passenger Car (ie; a Prius)
Average Passenger Car (3,512 BTU per passenger mile)
Passenger Trucks/SUVs (3,944 BTU per passenger mile)
Bus (4,235 BTU per passenger mile)
Turboprop Passenger Plane (for short distances)
Fuel Efficient Passenger Jet (for long distances)
Piston Engine Passenger Plane
Older Passenger Jets
Small Prop Plane (ie; Van’s Aircraft’s RV-7: ~36 MPGe per passenger at full capacity)
Ferryboat
Helicopter (~20 MPGe per passenger at full capacity)
Cruise Ship (~17 MPGe per passenger at full capacity)
Motorboat (~15 MPGe per passenger at full capacity)
Jet Ski (~10 MPGe per passenger at full capacity)
Executive Jet (~0.8-5 MPGe per passenger at full capacity)

Are there any transportation methods that I’m missing? It’s hard to quantify the MPGe for a hang glider, sailboat, submarine, electric pogo stick, or jet pack, but if you have the scoop on how to rank an unusual form of locomotion, please drop a note in the comments at the bottom of this page.

So, how can you use this list? Before you book a trip or reserve a hotel room, make sure to check out all of the options that are available. Instead of flying cross country, do you have time to take the train? Instead of staying at a hotel across town from a conference, can you find a hotel within walking distance and skip the rental car?

A few more tips for carbon efficient travel…

Often, the green choice will yield a more pleasant trip and save money at the same time!

Photo courtesy of svanes

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