This green roof will be the largest in Canada when complete. It's the roof of the Vancouver Convention and Exhibition Centre. The whole Centre is being built with high environmental standards. Besides the multi-hectare intensive green roof, it will have energy efficient lighting and electrical systems, an on-site desalinization system, and a greywater treatment that will provide irrigation for the green roof. The footings for the load-bearing piles have been designed to support marine life. The building will also house the Coal Harbour marine aerodrome, a seaplane airport with more than 400 daily flights. During the 2010 Vancouver Winter Olympics the building will serve as the international broadcast center.
Here's another rendering with an aerial perspective: