Green Left: If authoritative, peer-reviewed science suddenly found obesity or smoking to be twice as lethal as earlier believed, would the news be all over the media? Of course it would. But a doubling of the likely impacts of greenhouse gas emissions? That, it seems, is not important enough for mainstream media outlets to bother reporting in much detail. Arguably the biggest climate science news of 2008 was the finding, by a group of researchers under renowned US climatologist James …