There's no global warming because there's no greenhouse effect. It's a manufactured fiction not science They could have avoided wasting their money put it to better use toward something else.
I wouldn't go that far. There are a few questions here:
1) Is there global warming?
2) If so, is it caused by man?
3) If so, is it significant?
4) If so, how can we be certain of it's significance?
4) If it is significant can we be certain that the steps we will take will not be out of proportion to the problem or won't cause greater problems?
IMO I think there is global warming. Question 2 is where the issue becomes cloudy.