guanxi writes: In an NPR interview NASA chief Michael Griffin, a rocket scientist, put the reputation of his famous research organization (not to mention the United States) behind this statement: "I have no doubt that
... a trend of global warming exists. I am not sure that it is fair to say that it is a problem we must wrestle with." I was going to add commentary, but there's little you can add to statements like this one: "To assume that it is a problem is to assume that the state of Earth's climate today is the optimal climate, the best climate that we could have or ever have had and that we need to take steps to make sure that it doesn't change. First of all, I don't think it's within the power of human beings to assure that the climate does not change, as millions of years of history have shown. And second of all, I guess I would ask which human beings — where and when — are to be accorded the privilege of deciding that this particular climate that we have right here today, right now is the best climate for all other human beings." To most people, of course, the words of the head of NASA are authoritative.