stop simplifying things and taking out of context Denk your better than that, as far as im aware the only thing that is settled is that:
A: green house gasses have a green house affect?
B: Humans are pumping green house gasses into the atmosphere and this is affecting climate.
Do you think this is not the case or something???
The over all affects, amount of change, feedback systems, solar variance etc is still being researched.
