In article <01bd2ccb$df4a1780$1f621e82 at oemcomputer>, "Ken Wolfe" <wolfe at intellistar.net> says:
>>When I was in high school my science project was to see the effects of cigs
>on plant growth. The plants were kept in a terrarium type structure. One
>terrarium had cig smoke blown in twice a day the other had just regular
>air. Initially the plants receiving the tobacco smoke grew faster.
>However, after a few weeks they stopped growing and the others grew larger
>and seemingly healthier.
Could the faster growth-rate have anything to do with the higher CO2
level in the smoke?