I've been arguing with folks on facebook a lot lately, because they claim they don't "believe in" climate change. I quickly realized that I don't have to explain the mountain of data from scratch, because there are groups already set up to do this. So, here's the 4th IPCC report on global climate change:
https://www.ipcc-wg1.unibe.ch/publications/wg1-ar4/wg1-ar4.html
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