I went on a tourist attraction in Sheffield at the weekend - a giant ferris wheel in the centre of town. It was a lovely day and you could see, well not quite far and wide due to Sheffield's topography so you couldn't really see beyond any of the 7 hills that make up the landscape of the city, but it was really interesting. Despite Sheffield having a policy of requiring 80% green roof coverage on new major development in the city I didn't notice any green roofs. The roofscape [if that's a word] was disappointingly grey. If you click on the image you get a nice shot of Park Hill in the background.