Narrator: This is Science Today. By now, a lot of cities have passed smoke-free laws in public places, including restaurants and bars. Stan Glantz, director of the Center for Tobacco Control Research and Education at the University of California, San Francisco, says California, Delaware and New York have passed smoke ordinance laws and these laws are now spreading not just nationwide, but all over the world.
Glantz: The tobacco industry likes to portray these smoke-free laws as some kind of whacko California thing. But Helena, Montana is not California. I mean, places in Texas are passing these laws. Iowa, Nebraska, and then plus on the East coast now, too. So these laws are appearing all over the place. All the air-conditioned restaurants in Thailand are smoke-fee, which is about 80% of them. So I think we've really gotten to a tipping point with this issue now and I think it's not going to take much longer before we pretty much have smoke free environments everywhere.
Narrator: For Science Today, I'm Larissa Branin.