The theory has an enormous amount of evidence behind it, so I reject your "unproven theory" statement. We're definitely having some influence over the earth's temperature. His statement only indicates a "normal" temperature if you have no understanding of the actual science. Here's a tip: Al Gore is not a scientist. He does not have a degree in climatology, or even any scientific field. Stop listening to spokesmen and read the actual science, from peer-reviewed, well-respected science journals. That's the only way to be truly informed on a scientific issue.
Everything else is just a straw man. Whether or not Al Gore profits from green energy policy has no impact on whether or not AGW theory is accurate or not.
You should read up more on the subject:
RealClimate - run by actual scientists, good for a "layman's explanation."
Skeptical Science: Examining Global Warming Skepticism - Has arguments that skeptics propose laid out, and responded to.
Both websites source their statements very well.
Two youtube channels of guys who do regular climate-related videos. Greenman is a bit sarcastic and hyperbolic, but lays out some good info too. Potholer54 is excellent. Both are pretty good at sourcing their statements too, although if you want to run down their sources be prepared to pause the video so you can nab the full title of the papers they cite.
YouTube - potholer54's Channel
YouTube - greenman3610's Channel
This post is ironic because Cap and Trade was actually implemented under Bush Sr. (applied to sulfur dioxide and some other pollutants.) It was also part of the McCain/Palin campaigns platform. In both cases it was hailed as a free market solution to pollution.
I like Cap and Trade. When being efficient becomes a competitive advantage, businesses are going to strive for it. It worked for acid rain pretty well.