"Dr. Mann started off stating that climate change science is not controversial."

Green Science: The Climate War Will Be Fought With Hockey Sticks - Kayak Media NJ

Dr. Mann started off stating that climate change science is not controversial.
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Think Attorney General subpoenas, Congressional inquiries, and even death threats.

All waged by policymakers, politicians, and those with financial interests in keeping climate change science from being accepted as basic fact.
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But first, we need to stop arguing about the science.