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.

7 of 8
BACKNEXT
Biochar
Biochar
Currently farmers, foresters, and others that dispose of plants and trees usually leave them in the field to rot, or they burn them. Both those actions release carbon into the atmosphere.

How it works: This plan calls for farmers and the like to feed their waste into a machine that turns it into charcoal, seen here. The charcoal - or biochar - is then buried in the soil.

That would keep up to 40% of the carbon in the plant out of the atmosphere, and make the soil richer at the same time, said Jim Fournier, president of Biochar Engineering Corp.

Why it might not work: Questions remain over whether biochar could absorb enough carbon to make a difference in global warming.

NEXT: Hurricane-killing wave pump

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
10 of the best beaches near airports Wait out your layover in the transit lounge? Or grab some sun, sand and surf? More
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
A White House press briefing as told by CNN's sketch artist The White House started banning cameras during some briefings, so CNN sent in sketch artist Bill Hennessy. More

Special Offer