Chemical 'sponge' could filter CO2 from the air

12:37 03 October 2007
NewScientist.com news service
Catherine Brahic

Sucking carbon dioxide out of the atmosphere could provide a last-ditch solution to climate change, according to calculations performed by a US scientist.

Frank Zeman at Columbia University in New York, US, believes CO2 could be efficiently extracted from the atmosphere using a relatively simple chemical process, before being buried underground.