Wow.... The part to worry about is
whether or not people are causing it, not whether climate change is happening.
Consider what would be the case if we found out that every time a dog barked, it lost a day of its life.
We have no control over when dogs bark. People pretty well understand that. But it would still be a global epidemic - we must stop dogs from barking, or else they'll die!!!
(I'm not saying that this is the case; I'm just illustrating an example).
People are worried about a symptom. The symptom is easy to worry about; people can understand it, and god knows politicians love to emphasize it.
However, we don't have conclusive evidence of the cause. There's correlational evidence, but correlation does not reflect causation. There's discussion as to whether there is
increased solar activity that's actually causing global warming (but *gasp*, we can't control the sun! How can we ever hope to use this as an issue for elective office?!?).