What I'm finding utterly fascinating about this topic is that the responders are primarily environmentalists of various 'sects' bitching with vitriol about each other's environmentalist priorities. They're as bad as fundamentalist Christians.
You're a vegan? Well, tough. Soy is bad for the environment and is killing the Amazon rainforest.
You drive a hybrid car? Screw you. Hybrid cars are powered by electricity, which is evil because it comes from power plants, which are run on coal, which is bad for the environment.
You can't win for losing.