Our Terms of Service and Privacy Policy have changed.

By continuing to use this site, you are agreeing to the new Privacy Policy and Terms of Service.

4 of 8
Carbon-sucking machines
Carbon-sucking machines
We've put it in the atmosphere for so long, why not take it out?

How it works: This device relies on panels made of a thin plastic membrane that traps carbon dioxide, pictured here atop a supporting structure.

The panels can be cleaned by placing them in a humid environment. The carbon can then be buried deep underground.

Each machine can capture the same amount of carbon as 1,000 trees. About 1 million of them would need to be deployed to keep carbon in the atmosphere at an acceptable level, according to Columbia Professor Klaus Lackner, who designed the system.

The main problem: The system uses electricity, so it would need to be supplied from renewable sources to produce substantial results. And some have questioned whether carbon stored underground will actually stay there for the long-term or eventually seep back up to the earth's surface.

NEXT: Ocean seeding

Last updated December 02 2009: 10:52 AM ET
Email | Print | Share  |  RSS
google my aol my msn my yahoo! netvibes
Paste this link into your favorite RSS desktop reader
See all CNNMoney.com RSS FEEDS (close)
More Galleries
Black Friday 2015 in pictures Shoppers around the country braved the crowds to get their hands on the best Black Friday deals. More
Driving the ultimate in '50s Mercedes-Benz style The SC was the car that re-introduced Mercedes-Benz as a global luxury car icon. More
Driving the world's first car Driving a replica of the 1886 Benz Patent Motorwagen, the first internal combustion automobile. More

Special Offer