USA Today: Efforts to reduce emissions of climate-disrupting greenhouse gases are moving at a pace that is, well, glacial. Human activity continues to spew tens of billions of tons of carbon dioxide into the air every year. And even though a bone-chilling cold snap has the eastern U.S. shivering this week, the globe as a whole continues to warm at a scary pace.
So it's not surprising that some scientists, economists and politicians have begun to discuss a Plan B.
Variously known as solar geoengineering,...