Scientific American: NASA could be one of the nation’s most potent weapons in battling climate change. The space agency has conducted decades of research into weather, life-support systems and the atmospheres of other planets providing it with unique skills to address this problem. It would be easy for policymakers to overlook NASA as they map out a strategy for solving Earth’s biggest environmental woes. But here are some important reasons why they shouldn’t. NASA has 21 Earth-observing spacecraft …