Doctors, environmental groups and residents are trying to figure out if there is a causal connection between pollutants from the steel industry and rates of cancer in Gary, Indiana. Pollutants you can ...

A new report revealed that most of the world has polluted air, with only 17% of cities globally meeting the World Health Organization’s air quality guidelines. IQAir, a Switzerland-based air quality ...

In the stratosphere, ozone acts as a protective layer. But in the troposphere, at ground level, this colorless gas is incredibly harmful to human health and the environment in ways scientists are ...