Currently, 90% of the city's power supply is produced by hydroelectric energy, a source of energy that Vancouver is also leading the world in. Fossil fuels are also being reduced with investments in solar, wind, tidal and wave energy systems. The city plans to reduce it's greenhouse gas emissions by 20% lower that those reported in 1990, as per the Kyoto Protocol.
In addition, the city has also seen the emergence of trash compactors, which are the equivalent size to a normal trashcan, but are able to hold five times the waste. This results in with less garbage trucks on the roads, as pick ups become less frequent to before.
To learn more about Vancouver, the Green City, follow this link to the official government page.