I really think that the enviro-wackos are another death cult. Note their mantra "humanity is a virus infecting the Earth Mother Goddess Gaia". Check the writings of some of the really hard core "deep ecology" types, and you will find radical depopulation schemes, requiring essentially what would be genocide. It has nothing to do with any science, it is an extreme cultish belief system.
The only difference is that they get a paycheck for bit***** about everything that's wrong with the way WE live.