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Anonymous,
Al Gore is the messenger and a very effective communicator (even though I have taken issue with him in my own blog on some details, such as the use of Kilimanjaro as a global warming icon). He did not develop any of the science, but he has taken pains to inform himself about it for more than 20 years.
The science he conveys is a powerful and growing consensus as expressed by the 2600 or so scientists who comprise the Intergovernmental Panel on Climate Change, established in the early 1990s. That panel's requirements for consensus were devised as a conservative brake on possible bandwagons.
Yet if you view the IPCC reports over the many years, you will see that there is a growing realization that human activities are primarily responsible for the global warming that the world is experiencing. They considered research on all the other phenomena you list, and find to a high level of confidence that humans are the major cause of GW.
I don't care if you don't want to believe Al Gore, but I have to wonder what you know that the IPCC membership doesn't.
If you don't like Al Gore's political solutions to environmental problems, then consider Newt Gingrich's proposals instead.
Fred Bortz -- Science and technology books for young readers (www.fredbortz.com) and Science book reviews (www.scienceshelf.com)