1.) An emotionally and socially dysfunctional person, driven by irrational desire(s) to put the entirety of humanity and the technology and innovation that brought society to the current peak of development out of comission for the sake of being "green".
Much like a schizophrenic, environmentalists defend their beliefs by citing paranoid ideation and theory with no basis in reality.
Environmentalists have banded together, using theatrics, literature, and pop culture to manipulate, guilt, and decieve the unsuspecting into setting aside perfectly good lifestyles, products, and manufacturing processes for inefficient, overly costly, and counterproductive ways in the name of being "green".
It should be noted that the use of "me too" advertising, elitism, and pop culture depiction of green as "hip" and "cool" has met with varying success toward those with limited mental fortitude, although igniting a backlash amongst the more intellecturally capable.
2.) A social status seeker (see: conformist) with little technical grasp of the underlying concepts, attempting to jump on the green bandwagon in a misguided attempt to become "hip" or "cool".
Jane was an environmentalist; she drove a Toyota Prius plastered with liberal bumper stickers and looked down her nose at everybody else who didn't.
So blinded by her self righteous status seeking crusade was she, that as Jane looked down her nose at the beat up 80's CRX passing by, she failed to realize that not only did it return 10 more MPG on two decade old technology, but was paid for and already returning savings to its owner. It also did none of the environmental damage that Janes Prius did, having already been manufactured some 20 years ago.