When flying in and out of cities the first things we notice as we approach from the sky are the acres and acres of barren wastelands: empty roofs covering warehouses, factories and apartment buildings. Green roofs provide an environmentally sound alternative, with benefits including: roof life extension, adsorption of carbon dioxide, urban habitats for birds, insects and bees, reduction of the urban heat island effect, decreased costs of heating and cooling and the invaluable exposure to greenery in the urban environment which betters health and social outcomes. more... See more text