Grist: Like this morning. I opened the newspaper to read a column in the New York Times by Joe Nocera. Its his fourth column pushing for the Keystone XL pipeline; fair enough. (Though in the third, he managed to get the economics of carbon so completely backward that he had to append a long correction to yet another column.) This time, though, the vehicle he used was an attack on NASA scientist James Hansen, who had correctly identified the huge amount of carbon in the tar sands of Canada and Venezuela....