Ozone (/ ˈ oʊ z oʊ n /) (or trioxygen) is an inorganic molecule with the chemical formula O 3. It is a pale blue gas with a distinctively pungent smell. It is an allotrope of oxygen that is much less …

Jun 20, 2024 · Ozone (O3) is a highly reactive gas composed of three oxygen atoms. It is both a natural and a man-made product that occurs in the Earth's upper atmosphere. (the …

Mar 27, 2025 · Ozone (also called smog) is one of the most dangerous and widespread pollutants in the U.S. It may be hard to imagine that pollution could be invisible, but ozone begins that …

Mar 20, 2025 · Ozone is a triatomic allotrope of oxygen (a form of oxygen in which the molecule contains three atoms instead of two as in the common form) that accounts for the distinctive …

Dec 20, 2024 · Learn about the consequences of ozone depletion and UV-B for human health and the environment. Ozone-Depleting Substances. See a list of chemicals categorized as ozone …

5 days ago · View the latest status of the ozone layer over the Antarctic, with a focus on the ozone hole. Satellite instruments monitor the ozone layer, and we use their data to create the images …

May 16, 2016 · Learn the difference between good (stratospheric) and bad (tropospheric) ozone, how bad ozone affects our air quality, health, and environment, and what EPA is doing about it …

Apr 2, 2025 · ozone layer, region of the upper atmosphere, between roughly 15 and 35 km (9 and 22 miles) above Earth’s surface, containing relatively high concentrations of ozone molecules …

Mar 31, 2025 · Learn about Clean Air Act nonattainment area and county information for criteria pollutants.

Apr 2, 2025 · Ozone harms plants and forests, worsens global warming. Ozone is a greenhouse gas and it’s estimated that around 0.2° Celsius (0.36° Fahrenheit) of current warming globally …