Study: Secondhand smoke kills 600K each year

LONDON The study, published in British medical journal "Lancet," is the first look at the global impact of secondhand smoke.

Researchers analyzed data from 192 countries collected in 2004.

They found that 40 percent of children and more than 30 percent of nonsmoking men and women regularly breathe in secondhand smoke, leading to hundreds of thousands of deaths from heart disease, respiratory disease, asthma and lung /*cancer*/.