National Public Radio: Climate science is on the defensive. The Intergovernmental Panel on Climate Change, regarded as the world’s top climate science institution, has conceded it published errors in its reports. This follows the release of hacked e-mails from prominent climate scientists that cast doubt on their objectivity. Most scientists say the evidence for a warming world is still as strong as ever. But some now acknowledge they need to do some housecleaning and improve their public relations …