Tag Archives: Ozone O3

2017 smog season packing a punch, with worst ozone levels since 2008

If our air seems terrible, well, it is. Smog season 2017 has arrived with a vengeance. So far this year, Southern California has endured 27 days with unhealthful levels of ozone, the hallmark pollutant of smog, making this spring the … Continue reading

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During heat waves, urban trees can increase ground-level ozone 

Planting trees is a popular strategy to help make cities “greener,” both literally and figuratively. But scientists have found a counterintuitive effect of urban vegetation: During heat waves, it can increase air pollution levels and the formation of ozone. Their … Continue reading

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125 million Americans breathe unhealthy levels of air pollution where they live, 2017 ‘State of the Air’ report says

The American Lung Association’s annual “State of the Air” report found that 125 million Americans live in counties with unhealthful levels of either ozone or particle pollution. While that number has decreased from the previous report, and the report card … Continue reading

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Spring is not the only thing in the air 

Warmer days are welcome, but this is often our most polluted time of year, with agriculture one of the biggest culprits Longer days are here at last, but in terms of air quality, spring is often our most polluted time … Continue reading

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Living in an area with high air pollution may impact women’s breast density

A study of nearly 280,000 women in the United States has found that living in areas with a high level of fine particles from air pollution may increase a woman’s chance of having dense breasts – a well-established risk factor … Continue reading

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EPA’s controlled human exposure studies of air pollution are warranted: The US Environmental Protection Agency (EPA) carries out experiments in which volunteer participants agree to be intentionally exposed by inhalation to specific pollutants at restricted concentrations over short periods to obtain important information 

The U.S. Environmental Protection Agency (EPA) carries out experiments in which volunteer participants agree to be intentionally exposed by inhalation to specific pollutants at restricted concentrations over short periods to obtain important information about the effects of outdoor air pollution … Continue reading

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Here are some of the world’s worst cities for air quality 

Trying to get away from airborne ammonia? Don’t linger in Lagos or Delhi. If you’re bent on avoiding ozone, you might want to add Beijing, Karachi, and Los Angeles to your list. These are some of the cities with the … Continue reading

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Winter ozone problem returns to western Wyoming gas fields

Itchy eyes and scratchy throats blamed on high levels of wintertime ozone have returned to western Wyoming’s gas patch for the first time in six years, and so too has finger-pointing over who’s responsible for fouling the air. The ozone … Continue reading

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