Can hacking the stratosphere solve climate change?

_Part 3 of the_TED Radio Hour _episode_ The Hackers. ABOUT DAVID KEITH'S TEDTALK Environmental scientist David Keith proposes a cheap and shocking way to address climate change: What if

we inject a huge cloud of sulfur into the atmosphere to deflect sunlight and heat? ABOUT DAVID KEITH Environmental scientist David Keith works at the intersection of climate science,

energy, and public policy. His research has taken him into some the realms of geo-engineering — including a dramatic potential solution to climate change, such as blowing a cloud of sulfur

into the sky to bring the average global temperature down. His other areas of study include the capture and storage of CO2 , the economics and climatic impacts of large-scale wind power, and

the use of hydrogen as a transportation fuel. His forthcoming book is called _A Case For Climate Engineering_. He teaches policy and engineering at Harvard University, and was named

Environmental Scientist of the Year by _Canadian Geographic_ in 2006. Copyright 2020 NPR. To see more, visit https://www.npr.org.