...if you live in an apartment, that is. That's the alarming conclusion of a new study which looked for signs of secondhand smoke in thousands of children who come from smoke-free homes.

For a certain Italian man, the answer is a definite 'yes'. The Lancet just published a case study showing that the popular social networking site can leave some people breathless.

Mesothelioma is a very serious disease affecting thousands of Americans, and this Sunday is a day of awareness. Today, we discuss what is known about mesothelioma.

And it doesn't take much. A new study shows why all smoke - even secondhand - is dangerous.

We all know the ozone layer is a good thing. Way up in the atmosphere, ozone protects us from the sun's harshest rays. But when ozone forms on the earth's surface, it's one of the most potent air pollutants. And it only gets worse as the summer heats up.