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
Five most expensive cars sold at Pebble Beach These classic cars went for seven figure sums at the world's premier classic car event. More
Seats that move! Rain! Movie-watching goes beyond 3D How can movie theaters compete when many prefer to watch streaming video from their own comfy couches? Some hope a new interactive technology will lure audiences with immersive effects. More
15 cool cars for sale at Pebble Beach While these events are best known for seven-figure classics, just about everything crosses the block at Pebble Beach. More

Special Offer