"Particle pollution is made of soot or tiny particles that come from coal-fired power plants, diesel emissions, wildfires and wood-burning devices".
JoAnna Strother, director of advocacy for the American Lung Association, says the report's goal has always been to raise awareness about air pollution and its consequences. The New York-Newark metro area remained the 10th worst in the nation for ozone, while the Philadelphia-Reading-Camden area was the 21st worst, three spots worse than last year's report.
The report lists "Fresno-Madera-Hanford" as the most polluted for year-round particle pollution.
The region - which in the ALA report released Wednesday includes New Jersey's Warren County - received an F for the number of days of high ozone pollution, aka smog, according to data for the years 2015 to 2017.
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More Americans are breathing air that will make them sick, according to the American Lung Association's annual State of the Air report.
The ALA measured ozone pollution by using the U.S. Environmental Protection Agency's Air Quality Index.
The report states that California has seven of the ten most ozone polluted cities in the United States, with Los Angeles being the top (LA had almost 120 days in which ozone was above the healthy limit). Ozone attacks the lungs - some people describe ozone pollution as "sunburn for the lungs".
Multnomah County scored a C for particle pollution. California dominated the list of most-polluted cities.
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Every year the association looks at data from federal air monitors in 900 counties. Beyond the Valley's problematic topography - a bowl surrounded by mountain ranges that traps pollution in - he highlighted transportation-related pollution sources, including from major highways and railways.
Balmes said the Valley is "particularly vulnerable" to start with, and is now threatened further by increased wildfire danger and warmer temperatures. Climate change poses many threats to human health, including worsened air quality and extreme weather events.
Bangor, Maine, and the Burlington-South Burlington area in Vermont were named by the association as two of the six cleanest-air cities in the country.
L’acteur Jean-Pierre Marielle est mort à l’âge de 87 ans — Cinéma
Tous les matins du monde n'auront plus la même saveur désormais. "J'en ai rien à foutre, je ne suis pas un acteur de tombola. Grande figure du cinéma et du théâtre français, il est décédé des suites d'une longue maladie.