It seems like the power structure would want to keep things going as they are now: more production, more consumption. Human-induced climate change instead would prompt fundamental changes which might threaten the current power structure. Furthermore, many environmentalist concepts seem to be bottom-up, local, and independent, not authoritarian.

Even if climate change was not man-made, the effects are already so drastic that we would have to man-make the climate, to offset whatever other forces are threatening life in many areas of the planet.