Fires and agricultural soils can rival cars and factories in emitting chemicals that lead to ozone, making it hard to meet air quality standards.

The EPA says Phoenix-area air quality has worsened to “serious” levels, a designation that would trigger growth restrictions, ...

The gradual improvement we’ve seen in the past two decades shows that international efforts that curbed ozone-destroying ...

one study all but confirms that this positive trend is a result of reduced ozone-depleting chemicals in the atmosphere. The study, recently published in Nature, reveals a bright spot in the current ...

As the adoption of cleaner-burning engines and electric vehicles drives fossil fuel emissions lower, scientists have discovered that a surprising pollution source is playing a significant role in ...

Ozone levels in the southeastern counties are indeed elevated, and that’s bad for the health of people living here. Blaming ...

Ozone Hole: How We Saved the Planet is available ... who persuaded President Reagan to phase out CFC chemical production; Professor Mario Molina, who won the Nobel Prize for identifying the ...

Haagy and other scientists eventually figured out that nitrogen oxides in the air were reacting with the VOCs, and sunlight provided the catalyst for these chemical reactions to create ozone. Nitrogen ...

where she and her colleagues gathered evidence that quickly confirmed the ozone hole's cause: chlorofluorocarbons, or CFCs—chemicals that were then used in refrigeration, air conditioning ...

Human activity accounts for the other half. Volatile chemical products, including paints, pesticides and adhesives, also contribute to ozone produced by human activity. Peter Marks, top FDA ...