The Climate Debates: How Dangerous Is Solar Geoengineering?

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Rolling Stone’s Jeff Goodell hosts a series of debates on climate solutions. For this installment, he speaks with Harvard’s David Keith and author Alex Steffen about geoengineering

Geoengineering may be the biggest, most controversial idea that scientists and engineers have cooked up since the nuclear bomb. In this debate, we focus on solar engineering, technology that would cool the planet’s temperature by spraying particles into the stratosphere to reflect away a fraction of the sunlight that is hitting the Earth. Building a sun shade for the planet is one way to think about it.

We discuss some of the central issues: Is the climate crisis so far gone that we need to consider risky ideas like solar engineering? Is solar engineering a hubristic dream of techno-elitists or the best tool we have to reduce the impacts of a warming climate for millions of people in the developing world? Who would be the winners and losers in a geoengineered world?

 

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