there are a lot of half-baqked theories about global warming. and now they are talking about global dimming as well. it seems they used incomplete data in making those theories, as has been pointed out by other scientists. i have found anti-warming sites as well as pro-warming sites. if someone were to give me 10 billion dollars to find global warming, you bet i would. it may be true or it may not be true. scientists themselves are not in agreement. like everything else, time will tell. i found a few more sites that are more current, as anyone can if they look, but im sure they wont meet your qualifacations. regardless, here they are.
http://www.americanpolicy.org/un/thereisnoglo...
http://www.usatoday.com/news/opinion/editoria...
http://www.cgfi.org/materials/articles/2003/n...
there are more but im not going to do that much work.
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Your first post is from an industry source and is written in its own self interest, your second pbs article is 6 years old and mostly backs up what i have been saying with some doubts from some scientists and there has been a pronounced shift in the opinions of legitimate scientists since then and the third site you quoted from goes on to say that the areas that are cooler couldn't be accurately measured because the equipment used can't determine the temperature under the snow in that area.