I think the biggest mess comes from the fact that sometimes people don’t even know WHAT they’re questioning anymore. And some people have adopted the attitude of “what, you think the world is flat?” when you even mention questions the idea of global warming DUE TO HUMANS.
The average world temperature is getting warmer. This can be stated as a factual statement (although recent articles in the news regarding the labs that did the worlds most “authoritiative study” then threw away all the original data because they didn’t want to bother backing it up is very shady).
But to say the average world temperature is getting warmer due to humans is a theory, and one that currently can not be proven. We know that the earth went through ice ages and all kinds of global climate change long before the invention of the Automobile, so while we may be spiralling towards death, it does make sense to continually question these things.
And RE the green tech bubble. Yes - thats going to happen, and yes, it will most likely collapse on itself. People also disconnect doing what is right for the environment (recycling, sustainablity) even if it has nothing to do with global warming. But the Al Gore threat of giant-wave death is certainly motivation to recycle your now $.05 water bottles.