@futurebird
The Vancouver Convention Center took some steps in this direction. It's a relatively low, broad building with a green roof populated with local grasses selected so regular rainfall will keep them healthy, supplemented by trickly irrigation from the building's gray water. The vegetation is dense enough that its runoff mimics that of a grassy field.
The HVAC system is centered around a chiller that uses Coal Harbour as a latent heat reservoir. It heats and cools the building using much less energy than a standard system.
On the other hand, it's a convention center, built for the purpose of having thousands of people travel long distances for a meeting that could have been an email. 😉
futurebird