Australian: CLIMATE change policy just got a whole lot harder. Once again, the culprit is the science. New research suggests that forests are not the carbon sinks they were assumed to be. Climate change policy-makers will have to return to the drawing board. In late 2008, while he was a Smithsonian fellow, Griffith University associate professor Peter Pollard, a chemical engineer and water quality specialist, spent six months in one of the world’s most isolated tropical jungles on …