Most of the world has dirty air, with just 17% of cities globally meeting air pollution guidelines, a report Tuesday found.

How is pollution actually affecting our health? - Invisible pollutants fill the air around us, and their effects on the human ...

The majority of the world is breathing in dirty air, according to the latest air quality report. So where does the U.S. rank?

The countries with the worst air quality included Bangladesh and India, according to an annual report from IQAir.

A new report paints a troubling picture of global air quality: the vast majority of people around the world are breathing ...