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
Here's what costs more than a barrel of oil Oil prices have crashed to below $27 a gallon -- a level not seen since 2003 -- which makes a barrel of crude cheaper than lots of everyday purchases that we don't think twice about. More
Super Bowl 50 ads are studded with celebrities The 2016 Super Bowl has rolled out the red carpet for the likes of Helen Mirren, Amy Schumer, Seth Rogen, Steven Tyler and the late, great Marilyn Monroe. More
The women of marijuana These women entrepreneurs and executives are making their mark in the marijuana industry. More

Special Offer