New research indicates that a regional nuclear war would deplete Earth’s protective ozone layer so profoundly that levels of ultraviolet radiation across the world would exceed levels now considered extreme.

New research points to more dust particles in the atmosphere than previously believed.

The impacts of the Antarctic ozone hole extend upward as well as downward, according to a new modeling study from a team of NCAR scientists.

A team of scientists is tackling a scenario that is the stuff of Hollywood thrillers: What happens if a medium-sized asteroid strikes Earth? In particular, what if it crashes into the ocean? The question is not fanciful.

Deciduous plants absorb about a third more of a common class of air polluting chemicals than previously realized.