President Barack Obama’s plan to reduce carbon pollution — acclaimed by supporters, reviled by opponents — won’t be enough to save the planet. That’s the view of scientists, including European researchers who study climate policies. It’s a numbers game: Even if the U.S., China, Europe and other nations meet their commitments on cutting carbon, world temperatures will rise by 3.1 degrees Celsius (5.6 degrees Fahrenheit) on average by 2100, too much to avoid calamity, they say. The latest and toughest version of Obama’s Clean Power Plan and measures already announced by other world leaders aren’t sufficient to limit global warming to 2 degrees Celsius this century. That’s what’s needed to prevent dangerous changes to the environment, including rising seas, deadly heat waves and disruptions to world food supplies, according to the Intergovernmental Panel on Climate Change , a United Nations-organized panel of thousands of scientists. “It’s worth pointing that […]