While it was a great (and I am sure they would agree, undeserved) honor to be associated with the geophysics deprtment at the University of Chicago, some other departments at the place spook me. In particular, Sachs refers to a couple of unnamed
distinguished professors of law at the University of Chicago, who argued in the Financial Times on August 5 that the U.S. has no obligations to control greenhouse gases, and that if other countries don’t like how the U.S. behaves and how that behavior affects them, they might think about paying the U.S. to cut its emissions. In other words, the U.S. should behave as it likes. It is up to the others to induce the U.S. to change course.Sachs isn't buying this, and goes on to try to refute it, discussing in particular the recent Supreme Court ruling that greenhouse gases constitute pollution under American law.
I hope he's right. If he's wrong, if the laws of people and the laws of nature are in conflict, then it's human law that has to change.