House in Thousand Islands By Shim Sutcliffe
Green roofs came into their own early in the decade, primarily due to the great work of Steven Peck and Green Roofs for Healthy Cities; They turned it into a movement, "to increase the awareness of the economic, social, and environmental benefits of green roof infrastructure. " By 2003 they were even running awards programmes.
An early winner and still one of my favourites was Bridgitte Shim and Howard Sutcliffe's green roof on a house in the Thousand Islands of Ontario. Their motive for doing a green roof: "The architects wanted to retain the openness of this agrarian landscape while providing their clients with privacy and a splendid view of this grand river."
More: Green Roofs for Healthy Cities
Credit: John Dow, via Greenroofs.org