The Green Party of the United States is available at: www.gp.org
According to wikipedia, “The Green Party of the United States (GPUS) is a green political party in the United States founded in 1984 as a federation of state green parties. With its founding, the Green Party of the United States became the primary national Green organization in that country, eclipsing the Greens/Green Party USA, which emphasized non-electoral movement building. The Association of State Green Parties (ASGP), a forerunner organization, first gained widespread public attention during Ralph Nader. At the state legislature level the party has several members elected, including in California, Maine and Arkansas.> A number of Greens around the United States hold positions on the municipal level, including on school boards, city councils and as mayors. The party promotes environmentalism and social justice with policy principles in ideas such as nonviolence, grassroots democracy and participatory democracy, gender equality, and anti-racism”.