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This is CBS, I on the World. I'm John Batchel. The EPA, the Environmental Protection Agency

under the Trump administration, is very ambitious. I learned this from a new essay at Civitas Outlook at Civitas Institute,

from Professor Jonathan Adler, the Tazewell-Taylor, Professor of Law, William and Mary Law School.

Professor, a very good evening to you. This is about the word endangerment. I paid attention

when I read that endangerment. That's old-fashioned way of saying what might

happen. Danger, danger, don't go near it. But it turns on the EPA's ambition under the new

administration to take on something that was fixed, if I understand correctly, for at least a

decade. That is the ability of the EPA to declare that there is

reasonable expectation of harm or health or bad results from the climate of greenhouse gases.

And that was fixed some years ago.

So they're taking on something that you identify as very difficult and challenging.

Why so, Professor?

Good evening to you.

Well, good evening.

So this all has its roots in the Clean Air Act, which Congress enacted in 1970 and last revised in 1990.

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