How To Cool The Planet: Geoengineering and the Audacious Quest to Fix Earth's Climate

Climate discussions often focus on potential impacts over a long period of time—several decades, a century even. But change could also happen much more suddenly. What if we had a real climate emergency—how could we cool the planet in a hurry? This question has led a group of scientists to pursue extreme solutions: huge contraptions that would suck CO2 from the air, machines that brighten clouds and deflect sunlight away from the earth, even artificial volcanoes that spray heat-reflecting pa...