A third of Americans still breathe unhealthy air after decades of improvements—which the Trump administration wants to roll ...

Lahore is among the cities with the worst air pollution in the world; Islamabad is catching up; and even Karachi, despite its ...

air pollution caused 4.7m early deaths worldwide in 2021—about the same as dementia, road-traffic accidents, malaria and suicides combined. The most dangerous particles are those smaller than 2. ...

Kilometers above the Earth’s surface, the ozone layer protects humanity and all life from the sun’s harmful ultraviolet rays.

The move will give state regulators more time to develop a plan to improve air quality in metro Denver and the region, and to ...

The president's environmental actions will significantly increase the cost of living for millions of people and bring about ...

The decision bought officials time to avert economic harm, but raised concern from health advocates about the continued impacts of ozone on Arizonans.

Fires and agricultural soils can rival cars and factories in emitting chemicals that lead to ozone, making it hard to meet air quality standards.

Outside London, the local authorities with the highest percentage of heavily polluted neighbourhoods were Dartford, ...

Most immediately, the gas causes coughing ... and state officials more time to get a handle on the region's air pollution problem. Even so, officials and business leaders know it's only a short ...