World health organization

10 facts on second-hand smoke

Man smokes on bus
World Lung Foundation

Fact 9

More than 94% of people are unprotected by smoke-free laws. However, in 2008 the number of people protected from second-hand smoke by such laws increased by 74% to 362 million from 208 million in 2007. Of the 100 most populous cities, 22 are smoke-free.

© WHO. All rights reserved.