United Press International: China, the world's largest emitter of greenhouse gases, is demonstrating leadership in the fight against climate change, a new report says. The release of Australia's Climate Commission's "The Critical Decade: Global Action Building on Climate Change" report Monday coincided with the opening of the latest round of international climate change talks in Bonn, Germany. China's total investment in clean energy in 2012 was $65.1 billion, 20 percent more than the year before. "This was unmatched by...