CNN: Those beating the global warming drum have sure taken a few lumps lately. First there were the hacked e-mails from climate scientists, which critics say show an effort to massage some data and keep some scientists out of the debate. Facebook Digg Twitter Buzz Up! Email Print Comment on this story Then there was an admission from the Untied Nations’ top climate body saying that it relied on some flawed numbers to predict a Himalayan glacier would soon melt. Add to …