Travel companies are pushing for better air, or so they say. Smoking bans started on airlines in the 1980's and Northwest Airlines was one of the first to ban smoking on all flights. Recently hotel chains like Marriott, Ritz-Carlton, Westin, Sheraton and Comfort Suites have banned smoking on all premises.
Rental car companies are joining the ranks — as of next month Avis, Rent A Car and Budget Rent A Car will be...