They’re still number one. But a new study reveals that Chinese fossil fuel emissions are 14 percent lower than earlier estimates. China’s coal, while dirtier in terms of local air pollution, contains 40 percent less carbon than previously thought, and its cement industry produces 35 to 45 percent less greenhouse gas than suspected. It’s still well ahead of the number two polluter — the U.S. — but the discrepancy could prove a distraction at December’s U.N. Climate Change Conference in Paris, where 190 countries will try to forge an agreement on limiting emissions.