Canada, the world's second largest country by area, has abundant natural resources. Its vast territory includes large tracts of undisturbed wilderness. However, urbanisation and agriculture are putting pressure on the natural asset base. Since 2000, Canada has made progress in decoupling economic growth from air pollution, energy consumption and GHG emissions, but it remains one of the most energy- and emissions-intensive economies in the OECD. Further progress is needed to transition to a green, low-carbon economy. This is the third Environmental Performance Review of Canada. It evaluates progress towards sustainable development and green growth, with special features on climate change mitigation and urban wastewater management.