Abandons pledge to reduce carbon dioxide emissions.
Rejects Kyoto Protocol.
Pushes to open the Arctic National Wildlife Refuge to oil drilling.
Refuses to name industry participants in Cheney’s energy task force.
Reduces funding for greenhouse-gas reductions in developing countries.
Uses terrorist attacks as excuse to weaken protection of wetlands.
Guts tough mining protections on federal lands.
Issues weaker arsenic-in-drinking-water standard.
Allows expanded oil-drilling in Big Cypress National Preserve.
Rolls back power-plant pollution standards.
Backs Yucca Mountain plan for nuclear waste dump.
Eric Schaeffer, a top EPA official, resigns in protest of Bush policies.
Citing national security, Pentagon seeks environmental laws exemption.
Misses deadline to boost automobile efficiency.
Allows mining in Everglades.
Rolls back air-conditioner energy-efficiency standards.
Kills corporate tax on polluters that funds cleanup of toxic waste sites.
Opposes Senate-backed renewable energy requirement.
Calls for increased logging in the name of fire prevention.
Only major leader not at UN Summit on Sustainable Development.
Stacks panel on lead poisoning with industry officials.
Announces plan to allow snowmobiles in two national parks.
Repeals rules requiring older factories to cut pollution emissions.
Defers action on global warming.
Plans to weaken Clean Water Act wetlands protections.
Compiled by Eric Ditzian. Sources: Sierra Club and Natural Resources Defense Council.