National Public Radio: Next Monday, governments of some of the world’s biggest emitters of greenhouse gases are scheduled to announce how much they’ll limit the emissions that warm the planet. That’s the deal they made at the Copenhagen climate conference in December. No matter what cuts they promise, they’ll all have to take a long, hard look at how much coal they use. It used to be that coal was king in the U.S. But now, coal is guo wang — that’s “king” in Chinese. “Coal is 80 percent of …