Green roofs, also called 'vegetative', 'living', or 'eco-roofs', are living plants installed on top of traditional roofs. In addition to providing a haven for birds and other wildlife, the green roof provides many other benefits for the environment-- the reduction of storm water runoff, reduction in the amount of blacktop roofs in the city which reduces the heat island effect and reduction of HVAC cooling loads resulting in the lowering of utility bills. Green roofs also have the additional advantages of lengthening the waterproofing membrane life of the roof and help to improve the air and water quality of the area.