Greenpeace is an independent, campaigning organisation which uses non-violent, creative confrontation to expose global environmental problems, and to force the solutions which are essential to a green and peaceful future..

The Sierra Club is a non-profit, member-supported, public interest organization that promotes conservation of the natural environment by influencing public policy decisions -- legislative, administrative, legal, and electoral.

National Wildlife Federation advances common-sense conservation policies through advocacy, education, and litigation in concert with Affiliate Groups and other like-minded organizations across the country and around the world. Efforts focus on the conservation of wildlife and wild places and the health of the environment upon which we all depend, with special emphasis on wetlands, water quality, endangered habitats, land stewardship and sustainable communities.

Rainforest Action Network works to protect the Earth's rainforests and support the rights of their inhabitants through education, grassroots organizing, and non-violent direct action.