Nuclear war is a terrifying existential threat, but we shouldn't only fear the blasts because the ensuing smoke is the real killer.

Delhi now outranks Beijing as the world's most polluted city. Carbon dioxide, ozone and fine carbon particles get trapped over India's capital, mostly due to dirty fuels, causing long-term health consequences such as lung and heart...

A study suggests aspirin could reduce health effects of air pollution on the lungs by nearly half.

NASA Hangout: Wildfire and Climate Change

Atmospheric scientist Róisín Commane and Principal Investigator Steven Wofsy both of Harvard University sent back a video postcard from the Atlantic legs of the Atmospheric Tomography, or ATom, mission. The science team left...

Tiny particles suspended in the air, known as aerosols, can darken snow and ice causing it to absorb more of the sun’s energy. But until recently, scientists rarely considered the effect of all three major types of...

Black carbon, composed of tiny particles of soot, is produced whenever organic substances like fossil fuels, firewood or coal is incompletely burned. These particles are polluting the air and causing serious health and environmental...

Atmospheric scientists Bernadett Weinzierl of the University of Vienna, Paul Newman of Goddard Space Flight Center, and Róisín Commane of Harvard University sent back a video postcard from the last three legs of the Atmospheric...

The fires burning in the Amazon rainforests are accelerating the melting of Andean glaciers <br/>

Jul.01 -- As private space companies like SpaceX and Virgin Galactic work to bring down the cost of launching rockets, one German startup is looking to take that mission further. Isar Aerospace aims to create a "fast taxi" for smaller...

US officials say they're not sure when a fire at a Houston-area petrochemicals storage facility will burn itself out, but they are confident that the air quality is safe.

Authorities say a drop in water pressure caused a large fire at a Houston-area petrochemicals terminal to intensify overnight and spread to additional storage tanks.

Authorities say a drop in water pressure caused a large fire at a Houston-area petrochemicals terminal to intensify overnight and spread to additional storage tanks.