ClimateWire: China will put in place a nationwide carbon emissions trading program in 2017 and agree to stringent transparency rules in a new global climate change accord as part of a sweeping announcement President Obama and President Xi Jinping will make today, White House officials said. The joint call to action on global warming will be the second time in less than a year that Obama and Xi have stood side by side to pledge joint cooperation between the worlds two largest economies and emitters of greenhouse...