InsideClimate News: Pledges made so far by Europe, the United States and China to cut greenhouse gas emissions aren't enough to keep global warming within safe limits, according to a new report by the International Energy Agency. But the agency also said that if nations increase their efforts, there is just enough time to change direction with existing technology and without economic penalty. In this year's climate talks, the analysis says, the overall test of success is whether the world's governments demonstrate...