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Could Spraying Aerosols Into The Atmosphere Cut Global Warming Impacts In Half?08:22
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In this Jan. 19, 2012 file photo, smoke rises in this time exposure image from the stacks of the La Cygne Generating Station coal-fired power plant in La Cygne, Kan. Federal records show that this year the nation’s weather has been hotter and more extreme than ever. (Charlie Riedel/AP, file)
In this Jan. 19, 2012 file photo, smoke rises in this time exposure image from the stacks of the La Cygne Generating Station coal-fired power plant in La Cygne, Kan. Federal records show that this year the nation’s weather has been hotter and more extreme than ever. (Charlie Riedel/AP, file)

It may sound like an idea out of a science fiction movie: spraying aerosols into the atmosphere to reflect sunlight and cool the Earth.

But a new study by scientists at MIT, Harvard and Princeton says the process — called solar geoengineering — may be a cheap and effective way to reduce the impacts of global climate change.

Guest

Kerry Emanuel, professor of atmospheric science at MIT. The Department of Earth, Atmospheric and Planetary Sciences tweets @eapsMIT.

This segment aired on March 11, 2019.

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