While I'm not denying reality - global warming is happening - I'm questioning the models proposed by the scientists. Let them come up with a model that doesn't completely fall apart 10 years later. So far, all models produced before 2000 have proven to *not* forecast the reality of things.
I'm not saying those guys are charlatans, but if they try to convince me that the sea level will rise by 2m in 100 years I'll laugh, and pretty hard at that. Nobody is actually able to predict anything beyond a couple of years, so 100 years is well beyond their best effort so far.
Granted the climate is an extraordinarily complex thing to model and so to predict. What exactly are going to be the consequences of the global warming is yet a thing to discover.
Now, this doesn't mean that we should do nothing about it and wait & see. But shouting all over that in XX years, YY will change by ZZ is in my view discrediting the cause for the simple reason that those claims have always proved to be just plain wrong. So far.