Southern California ozone pollution declining in recent decades

What is the origin of the volatile hydrocarbons, other than methane, present in city air? Mainly gasoline-powered vehicles, according to a study carried out by a French-US team. The study also shows that the proportion of ...

As Asian countries develop, they are emitting more ozone precursors that pollute surface level air. Many studies have documented this pollution being carried by air currents to the western United States. To learn more about ...

Air pollution from wildland fires and urban and agricultural areas in California is diminishing air quality at Devils Postpile National Monument, according to a recent study published in the journal Atmospheric Environment.

The U.S. Environmental Protection Agency announced a proposal Thursday to strengthen the nation's air quality standard for ground-level ozone.

There is good news and better news about ground-level ozone in American cities. While dangerous ozone levels have fallen in places that clamp down on emissions from vehicles and industry, a new study from Rice University ...

The notoriously smoggy skies of Los Angeles are a little bit cleaner than you might expect, at least in one respect. According to a study by the National Oceanic and Atmospheric Administration, the levels of certain vehicle-related ...

When it comes to oysters and their role in reducing nutrient pollution, a new study by researchers at William & Mary's Virginia Institute of Marine Science gets right to the guts—and the shell—of the matter.

Better stewardship of the land could have a bigger role in fighting climate change than previously thought, according to the most comprehensive assessment to date of how greenhouse gas emissions can be reduced and stored ...

Beneath the peaceful rolling waves of a lake is a rumble, imperceptible to all but seismometers, that ripples into the earth like the waves ripple along the shore.

Scientists have shown that ocean clams and worms are releasing a significant amount of potentially harmful greenhouse gas into the atmosphere.

A huge spike in carbon emissions seen in the past couple of years has puzzled scientists, since there was no evidence of a rise in human activities, like fossil fuel burning, that might explain it.

Late last month, a stratovolcano in Bali named Mount Agung began to smoke. Little earthquakes trembled beneath the mountain. Officials have since evacuated thousands of people to prevent what happened when Agung erupted in ...