CNN: Procrastinate on tackling a problem and it might get worse, and more expensive. Climate change is no different, a new report says. The longer we wait to mitigate the detrimental levels of carbon dioxide thrown into the atmosphere, the harder it's going to be to work against rising temperatures, says a leaked draft report from the United Nations Intergovernmental Panel on Climate Change, obtained by CNN. "It's really about cars and coal," said Marilyn Brown, professor of public policy at Georgia...