text: "Carbon math," wrote Mr. Lazear, "makes clear that without major effort and a good bit of luck, we are unlikely to control the growth of emissions enough to meet the standards that many climate scientists suggest are necessary." Those scientists are usually on college or university faculties where securing federal and other grants to study a warming that is not occurring leads to urging limits on carbon dioxide. Others are just huge liars who, like Al Gore, have been making predictions of warming that have not and are not coming true.