Green roofs. Heard of? Not a new concept, but new to me.

I know, I know, I'm way behind the rest of the game. But keep in mind that I'm not in North America. Green roofing involves putting soil and vegetation onto a building's roof. While significantly more costly than regular shingles or roofing methods, green roofs can help reduce running costs of electricity, keep air both milder and cleaner, and possibly provide a roof-top garden as well. Being at the age where plenty of people are buying new homes, this is definitely something I would consider with my housing purchase (or at least with future renovations)... if it can be covered by insurance.

Here are some resources:
Green Roofs For Healthy Cities
greenroofs.com
wikipedia's page on green roofs
treehugger.com: Green Vancouver Convention and Exhibition Centre
Hydrotech: Green Vancouver Main Library
Canada.com story: B.C. insurers refuse to cover green roofs
Canada.com story: Insurers put the brakes on green roofs