Its pretty well known among environmentalists that the American green party isn't "green" enough. Its not a truly environmentalist party that puts environmental issues above human issues. A environmental party must be anti-consumerism and anti-materialism. It should be against growing the human economy but instead making it more efficient. That means doing hard things that hurt human appetites/sensibilities but are better for the planet (ie. limited human migration, decreasing imports).

https://en.wikipedia.org/wiki/Deep_ecology