Expect moderate levels of ground-level ozone, an urban pollutant that can affect those with sensitive respiratory systems, to be in the skies over the Houston metro area on Friday, according to Texas ...

Ozone, a pale blue gas with a characteristic after-lightning smell, is the main component of smog: the sometimes-foggy air that blankets Houston during the summer months. It is one of the city’s most ...

We need ozone in our atmosphere to protect us from harmful ultraviolet rays, but too much at the ground level can make people sick. Ground-level ozone forms more often in the summer, making it a ...

A new study reveals that ozone transported from the upper atmosphere is a widespread and previously underrecognized source of ...

Ozone from the stratosphere - 10 miles above ground, plunged to the surface producing air quality alerts across southern Colorado on Monday. This is rare. And, it came on top of the intense and ...

Air quality in the Reno-Tahoe area reached such harmful levels earlier this month that ground-level ozone was detected, Northern Nevada Public Health’s air quality management division said in a Friday ...

Nitrogen, volatile organic compounds and sunlight are the three ingredients that form the smog that regularly chokes people and plants, causing tens of thousands of respiratory-related deaths and ...

This week’s weather across the state is very summer-like, with plenty of sunshine, light winds and low humidity. A system of high atmospheric pressure has moved over the state and is producing little ...