When volcanoes erupt, they spray particles into the atmosphere that cool the planet for a bit. As we get closer and closer to truly catastrophic global warming, more and more scientists are wondering whether a similar approach, called solar geoengineering, could be necessary. If it works, solar geoengineering could buy us some time to cut emissions and get our act together. If it doesn’t, the climate could be irreparably disrupted. No pressure. ––– Further reading: Brad Plumer explains the basics of geoengineering at Vox Umair Irfan walks through a new study on the limits of geoengineering The Stratospheric Controlled Perturbation Experiment, led by Harvard professor Frank Keutsch, seeks to learn more about the likely effects of solar geoengineering without actually doing it Gernot Wagner and his colleague David Keith make the cautious case for taking solar geoengineering seriously in the Wall Street Journal More of Vox’s effective altruism coverage ––– Discover more podcasts from Vox here.  Learn more about your ad choices. Visit podcastchoices.com/adchoices