Ozone pollution isn’t just a summer story anymore. In parts of northern China, high ozone levels are now appearing during winter—an alarming twist that defies decades of air quality science. This ...

Ozone is a chemical compound consisting of three Oxygen atoms (O 3). The Oxygen we breathe is made of two atoms (O 2). Ozone is primarily found in the Ozone Layer in the stratosphere, however, it can ...

Mitigation of the ozone-pollution problem is complicated by the fact that ozone (O 3) is a secondary pollutant; that is, it is not emitted directly into the atmosphere, but is produced by ...

Standard methods of predicting air pollution don’t take atmospheric chlorine into account, but the chemical could be responsible for 10 percent or more of daily ozone production in local air, research ...

Lutyens’ Delhi is one of the most iconic neighborhoods of India’s capital. Home to the country’s parliament, numerous embassies, and a lush, 90-acre Mughal-era park, it’s an architectural paradise, ...

Southeast Michigan has experienced a marked increase so far this summer in what the state calls clean air action days, when weather conditions may cause the air quality to be unhealthy for some people ...

Ozone alerts have been issued across Texas, with officials urging reduced driving as pollution is expected to spike Thursday.

An Ozone Action Day has been issued for parts of Central Texas on Wednesday. Here's what it means.