Skip to Content (Press Enter)
TED: Ideas worth spreading

A critical look at geoengineering against climate change

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?
This talk was presented at an official TED conference, and was featured by our editors on the home page. 
© TED Conferences, LLC. All rights reserved.
Your profile
Log out