re: Scott Pruitt says carbon dioxide is not a primary contributor to global warming

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I thought, back then, those were the cause of the hole in the ozone which was letting all the heat out, causing the coming Ice Age?

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You're right -- that's exactly what they thought at the time. More recent studies using empirical data showed otherwise although I can't remember the thoery the came up with to explain the phenomenon.

It all goes to show that we really don't understand nearly enough to start enacting hugely costly programs, laws, and regulations that curtail our freedoms.