Artificial light, while beneficial to humans, has disrupted the natural day-night cycle and created light pollution, negatively affecting wildlife. Humans also suffer from light pollution, ...

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 ...

ROANOKE, Va. – Nearly half of the U.S. population is now living with unhealthy levels of air pollution. The primary culprits are extreme heat, persistent droughts, and increasingly frequent wildfires.