Imminent loss of NASA's Aura and Canada's SCISAT will severely diminish scientists’ ability to monitor ozone-depleting substances in the stratosphere.

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

Early-life exposure to even relatively low levels of ozone air pollution was associated with asthma and wheeze in childhood, ...

Children exposed to higher levels of ozone in their first two years of life were significantly more likely to be diagnosed with asthma or wheezing at ages 4-6 — but researchers didn’t observe the ...

The colorless gas is considered a secondary pollutant and usually remains high in the Earth's atmosphere where it helps ...