Yale Environment 360: When President Obama went to Beijing last November and met with Chinese President Xi Jinping, both leaders were aware of the litany of contentious issues that divided the United States and China. But a curious thing happened. Despite a host of intractable disagreements -- maritime disputes in the South and East China Seas, cyber-hacking, human rights Getty Images Presidents Xi Jinping and Obama discussed climate issues at the White House in September. abuses, trade protectionism -- the two countries...