I've just had problems with the concept that environmentalists have to give an "alarmist" projection of science to get any kind of reaction out of the populace. Doing things that is good for the environment is one thing; telling people they'd better do it or the world as we know it will end is another. And there is a middle ground between "doing nothing" and "telling the world they need to do this - or else".

(I'm really trying not to take a ranting tone at you here. I appreciate what you've said, in fact.)