Yeah, I'm watching it too.
Personally I don't have a side on the issue though. It's hard to tell if global warming is a real issue or if it's another part of Earth's cycle. There isn't enough evidence for me to say yes or no.
As for the concerts, Al Gore avoided a lot of the questions asking about the irony of garbage left behind and the impact that the concerts have on the environment. He also tried to avoid the question of if he was going to run as president and if he had a chance would he.