Subject: Pounds of CO from combustion of 1gal. of reg.unleaded gas?

I am asking this question because currently there is great debate over the 
deleterious effects of idling one's car on a cold morning. The local paper 
ran an ad stating that one gallon of gas produces 20 pounds of CO. I took 
chemistry in college awhile and go and all my intuition disagrees with this 
statement. Currently, we are allowed to idle car for 3 min. and risk a ticket 
for minutes after that. It has resulted in a few accidents from improperly 
deicing windshields before driving. I do want to protect the environment 
but not at the risk of more pedestrians being run over. I would like to raise 
awareness and make sure that there is not misinformation being printed 
in the paper. thanks for your time!

Re: Pounds of CO from combustion of 1gal. of reg.unleaded gas?