PAUL KRUGMAN

... their prepared testimony still had some memorable moments. One was the lawyer’s declaration that the E.P.A. can’t declare that greenhouse gas emissions are a health threat, because these emissions have been rising for a century, but public health has improved over the same period. I am not making this up.

Oh, and the marketing professor, in providing a list of past cases of “analogies to the alarm over dangerous manmade global warming” — presumably intended to show why we should ignore the worriers — included problems such as acid rain and the ozone hole that have been contained precisely thanks to environmental regulation.
...

The Truth, Still Inconvenient