Ideas change everything

A critical look at geoengineering against climate change

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David Keith |

TEDSalon 2007 Hot Science

• September 2007

Environmental scientist David Keith proposes a cheap, effective, shocking means to address climate change: What if we injected a huge cloud of ash into the atmosphere to deflect sunlight and heat?

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Environmental scientist David Keith proposes a cheap, effective, shocking means to address climate change: What if we injected a huge cloud of ash into the atmosphere to deflect sunlight and heat?

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This talk was presented at an official TED conference.

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About the speaker

Environmental scientist

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David Keith studies our climate, and the many ideas we've come up with to fix it. A wildly original thinker, he challenges us to look at climate solutions that may seem daring, sometimes even shocking.

Learn more

A Case for Climate Engineering

David Keith | The MIT Press (2013)

David Keith - *A Case for Climate Engineering*

Geoengineering: The big picture

Take a look at David Keith's work with geoengineering over the years. Browse his publications over at his homepage.

This talk was presented at an official TED conference.

Read our curation guidelines.