Al Gore & co. aren't really serious about saving the planet

Otherwise, they'd be doing more.

Dilbert, June 19

(Click to view full-sized image)

P.S. Just kidding, sort of. The definition of "Earth hater" varies, depending on which green you ask. But there is a general rule of thumb, taking the stereotypical Mr. Green as an example: an "Earth hater" is anybody who does less than Mr. Green does on behalf of the environment.