The United States and Canada are cooperating to improve environmental conditions in a variety of ways. One of the most significant is through the Great Lakes Water Quality Agreement, which was first signed in 1972 and has been updated several times since then. This agreement commits both countries to work together to protect and restore the Great Lakes ecosystem. The two countries are also working together to reduce air pollution, protect wildlife, and address climate change. For example, the two countries have established a joint commission to monitor and reduce air pollution in the region, and they are working together to develop renewable energy sources.