The troposphere comprises the lowest layer of Earth's atmosphere, stretching from the planet's surface to a little over eight miles into the sky. It also contains about 10% of the ozone in the ...

For decades, the United States made steady progress in reducing surface ozone pollution, the main ingredient in smog. But ...

Measurements from the Copernicus Sentinel-5P satellite show that this year’s ozone hole over Antarctica is one of the biggest on record. The hole, which is what scientists call an ‘ozone depleting ...

Add Yahoo as a preferred source to see more of our stories on Google. Just in time for the official beginning of ozone season in Colorado, Larimer County now has its first Loveland air quality ...

The U.S. Environmental Protection Agency (EPA) claims, based on climate change models, that there is a connection between climate change, ozone in outdoor air, and health effects, including asthma.

LANSING, MI — Michigan regulators are asking the U.S. Environmental Protection Agency to discount several high ozone days tied to wildfire smoke as they seek to ease air quality restrictions in parts ...

A NASA-supported study found that wildfire smoke is significantly increasing ground-level ozone pollution across the United ...