Climate negotiators meeting here in Paris have achieved a deal that could change the world. Conference chair and French foreign minister Laurent Fabius crowed that he had presided over a "historical turning point." Even when the hype has died down, that may turn out to be true. Even climate scientists who on Friday had sharply criticized an…

The rise in greenhouse gases in the atmosphere means far more energy is coming into Earth’s climate system than is going out, but half of that energy is missing and could eventually reappear as another sign of climate change, scientists said on Thursday. In stable climate times, the amount of heat coming into Earth’s system…