"Green" connotes an environment-first ethic.  In America the Green Party was founded in the 1980s to address 22 categories:   Energy, Forestry, Life Forms, Materials Use, Waste Management, Water, Air, General Economic Analysis, Finance, Land Use, Politics, Social Justice, Eco-Philosophy, Spirituality, Education, Food, Agriculture, Health, Peace and Non-violence, Community Organizing, and Strategy.  

Since then the Greens have expanded their issues, and become an avowedly "Left" organization.  Environmentalism still has sway, but radical feminism, workers' rights, and social welfare are paramount to many Green party members.  All Green issues, but particularly the environmental ones leave the Party prey to Marxists.  They use popular sympathy for environmental causes to attach their hegemonic solutions to Greens' issues.  The Green Party fielded  its first presidential candidate in 2000, Ralph Nader; he received 2.6% of the popular vote and was blamed for causing Democrat Al Gore to lose to Republican George W. Bush.  Jill Stein was the Party's nominee in 2012 and she is the main candidate seeking their nomination in 2016.  Stein is a fierce advocate for the environment and believes that investments in green issues can propel the American people and economy forward.