Listen everybody, I know I come across as a pedantic, rude jerk on this topic but it's hard to be arguing the exact same effing points and dealing with the same refudiations of the science over the past 10 years. Meanwhile, the science has only solidified and the likelihood of disaster gets more and more real. This is the defining issue of our civilization.
I'd really just recommend this video by Dave Roberts
http://grist.org/author/david-roberts/ . In it he basically summarizes the science on the imperative of action. (hell read his blog, he's the most down to earth person who understands the crisis of climate)