Nothing to choose: Both are bad in different ways. Tobacco smoke predisposes to heart attacks, aggravates respiratory problems and may marginally increase the risk of cancers. Auto exhaust causes respiratory damage, carbon monoxide poisoning and depending on the type of exhaust may increase the risk of cancers.
Answered 6/23/2012
5.8k views
A doctor has provided 1 answer
A doctor has provided 1 answer
4 doctors weighed in across 2 answers
A doctor has provided 1 answer
11 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question