Trees become "carbon sinks":
To produce its food, a tree absorbs and locks away carbon dioxide, a global warming suspect. An urban forest is a carbon storage area that can lock up as much carbon as it produces.
By Steve Nix, About.com
Tips that will help finance your education, excel in the classroom, and advance your career. More >
Being well prepared is the first step; here are more essential suggestions. More >
©2009 About.com, a part of The New York Times Company.
All rights reserved.