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
BACKNEXT
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
World's Top Employers for New Grads For an exclusive CNNMoney list, research firm Universum Global surveyed business students at colleges around the world to see where they most want to work. More
Brexit voices: In or out? CNNMoney speaks to British people to find out their views ahead of the referendum on EU membership. More
10 key facts about the U.S. economy Unemployment is down, gas is cheap and America is growing. But just how strong is it? More

Special Offer