It's amazing this thread has evaded the moderators axe for so many pages! I've been following the debate for a long time. I have a reasonable science background, and part of my job is to review whether data supports conclusions.
There is so much uncertainty and political manipulation on this topic, that it's hard to be sure what's really up, but here's what I think:
The world is getting warmer: certain.
The warming is human caused: much less certain.
The warming is in excess of historical patterns: even less certain.
Now, given that, I still think we should reduce our use of fossil fuels. That's because fossil fuels pollute, they cause geopolitical turmoil, and they are important chemical precursors, so it's a shame to be burning them.
I also think that market forces will not make this happen. Oil will be cheaper than solar, etc., right up until the day the oil runs out. The change to other energy sources needs to be government driven.
But in the meantime, we should carpool to our hikes, and moderate our thermostats.