The heat and humidity mixed with smoke resulted in a "code orange" alert for Philly and its suburban counties.

Poor air quality can sneak up fast on hot days. Here’s what causes it, what to watch for, and how to protect your health, and ...

According to the DEM, unhealthy ozone levels can cause throat irritation, coughing and chest pain, as well as shortness of ...

Children, older adults and those with respiratory conditions could be vulnerable to the effects of air pollution in.

Rhode Island residents and visitors face another day of excessive heat and humidity, as well as bad air for those in the ...

During summer 2018, volatile chemical products played just as important a role in driving high ozone pollution levels in New York City as did volatile organic compounds (VOCs) produced by fossil ...

It is the NAAQS for ozone (EPA’s chosen indicator for “smog”) that has proven most intractable. 1 Ozone is formed by the photochemical reaction of volatile organic compounds and NOx in ...

Driving and fossil-fuel production both release large amounts of nitrogen oxides and volatile organic compounds, two categories of chemicals that react to form ozone when exposed to heat and sunlight.

During heat waves, the researchers found, trees can emit volatile organic compounds (VOCs) that help make air pollution, especially ground level ozone pollution, as much as sixty percent worse.

See 83 Fed. Reg. 61227. The final rule exempts cis-1,1,1,4,4,4-hexafluorobut-2-ene. HFO-1336mzz-Z is added to the list of compounds excluded from the regulatory definition of VOC.

Gasoline, which contains volatile organic compounds, also evaporates faster when it’s hot. The higher amount of volatile organic compounds in the air contributes to more ozone being formed on ...