Environmental groups are launching their biggest campaign effort aimed at defeating President Bush in the 2004 election. The League of Conservation Voters and Sierra Club plan to spend millions mobilizing activists and voters in key states against Bush's environmental record. They will criticize his policies on forests, water, and air quality. The groups are already hiring staff and gathering data to influence early primary states like New Hampshire and Iowa. Their goal is to chip away at Bush's popularity by portraying the Democratic candidates as better for the environment than the president.