In 2004 Cantwell received the highest rating possible from the League of Conservation Voters for her environmental voting record.[52] As of 2017, she has a lifetime score of 91% on the League's National Environmental Scorecard.[53] She is known for supporting alternative energy research and for protecting Washington's forests from logging and the construction of paved roads and has earned endorsement from various prominent environmental advocacy groups[52] and other environmental groups.[54][55] She has opposed drilling in Alaska's Arctic National Wildlife Refuge on multiple occasions, has voted to reduce oil usage by 40% by 2025, and has opposed legislation to relax or terminate CAFE standards.[56] The Seattle Times has described Cantwell's environmental record as "pristine",[57] and the Wilderness Society has described Cantwell as an "environmental champion".[58]