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
Where Millennials are buying homes Here are the top 10 markets where Millennials represented large shares of mortgages, according to Realtor.com More
Ralph Lauren's many looks A look at his brands and iconic creations More
8 biggest job killing companies of 2015 Whole Foods became the latest corporate giant to lay off workers. Here's a look at the companies that have announced the most jobs cuts this year. More

Special Offer