Just got word that thereâ€™s another green roof in Chicago! In a city known for green roofs, Apple Computerâ€™s Michigan Avenue retail store further establishes Chicago as one of the more eco-progressive cities in the U.S. This Apple store has 302 four inch GreenGridÂ® modules. Sedum kamtschaticum, a perennial succulent groundcover, was the plant of choice for their green roof. If youâ€™d like to find out more about green roof technology, check out this article on the EarthToys website.