http://www.ted.com/talks/al_gore_s_new_thinking_on_the_climate_crisis.html
He talked in the 15th minute about companies that would profit from a carbon tax. Many of them he has a stake in. He is pushing an agenda that could make him very very wealthy.
As for other planets warming up, just google it. It's all over the place:
http://www.google.com/search?hl=en&ei=jErYSY2KKeXelQev7ezFDA&sa=X&oi=spell&resnum=1&ct=result&cd=1&q=are+other+planets+warming+up%3F







