Green rooftops & Blade Runner

Ever since I saw on TV, by pure chance, the CNN bit on green rooftops, (linked below, the first one); I couldn't not stop to relate those images with Do androids dream of electric sheep?, the novel from which the film Blade Runner was inspired.
On the original novel the main character, Rick Deckard, used to live on a building that had a green rooftop and it even had mechanical goats (pretending to be real) wandering around the rooftop.

Green rooftop technology saves energy, cools air
Green roof for healthy cities
The Big Green Apple
How green is my rooftop
Google Images - Green rooftops