John Kerry has been a leader in the environmental movement throughout his career. Kerry was called the Senate’s most outspoken environmentalist and was named an Environmental Hero by the League of Conservation Voters. He helped lead the fight against acid rain in the northeast as Lieutenant Governor of Massachusetts, then as a U.S. Senator worked to defeat efforts to roll back the environmental accomplishments of a generation whether in the form of regulatory reform or efforts to drill in national monuments and the Arctic National Wildlife Refuge. And John Kerry led the effort to make environmental preservation a global priority through comprehensive treaties and by pushing for the inclusion of important environmental protections in free trade agreements.
http://www.johnkerry.com/issues/environment_position.html