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

Ground-level ozone is a major air pollutant that shortens human lives and kills thousands each year, resulting in major ...

Poor air quality has prompted officials to issue an ozone high pollution advisory for Maricopa County through Thursday.

Weather conditions can influence air quality and the impact of the Masters could be more or less pronounced depending on ...

The Maricopa County Air Quality Department said the levels are expected to exceed the federal health standard for ozone.

Residents of Houston and surrounding areas are being urged to limit emissions on Wednesday due to air quality concerns.

Jaipur: A recent report from the Central Pollution Control Board (CPCB) has identified Jaipur as one of the cities grappling ...

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

Ozone Action Day is in effect in Houston, Galveston, and surrounding areas, with high levels of ground-level ozone pollution, and those sensitive to air pollutants are advised to take precautions.

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