Daily Climate: Drastic, economy-changing cuts to greenhouse gas emissions will spare the planet half the trauma expected over the next century as the Earth warms. And that’s the good news. Because failure to significantly curb these planet-warming gases will truly transform our world in less than 100 years. A new study to be published by scientists at the National Center for Atmospheric Research finds that a 70 percent cut in emissions should stabilize temperatures at a mark not too …