HA HA HA HA. You would think these people would atleast be honest. They don't want to give up anything; they just want everyone else to.
I think their attraction to environmental extremism is because they want to lower the standard of living for 95% of the people. They want to widen the gap between themselves and the commoners. If you are a super-rich progressive, going on vacation to Hawaii in one's private Lear Jet, it kind of spoils it if a mere peasant can buy a seat on an airliner and also go to Hawaii. It doesn't really help that the peasant saved for years for his vacation. In principle, it is offensive to the progressives that a peasant is able to go anywhere he wants. Only the ruling class should enjoy freedom of movement and any luxuries. So the progressives hit upon the idea of convincing people that if they live in poverty it will "save the earth."