David wrote:
> Just to help me put things in perspective, how long does a person have > to breath to produce the same CO2 as burning a gallon of gasoline? How > many trees (or acres of trees?) would it take to keep up with the > typical car's CO2 output to convert it back to O2? Poke around the Rocky Mountain Institute site. I remember them having some of these comparisons: http://www.rmi.org/ Vince
