Plenty of fish login history1/16/2024 ![]() ![]() Blocks with median incomes under $20,000 had long-term UFP concentrations 40% higher than average. Researchers found the highest concentrations of all four pollutants on census blocks with median household incomes under $20,000 and those with proportionately larger Black populations.ĭisparities in concentrations of ultrafine particles - which are less than 0.1 micron in diameter, or 700 times thinner than the width of a single human hair - were especially stark. The study used mobile monitoring - a car loaded with air pollution sensors driving around the city for the better part of a year - to examine long-term average levels of four pollutants: soot (or black carbon), fine particles (PM 2.5), nitrogen dioxide (NO2) and ultrafine particles. The study, published July 5 in Environmental Health Perspectives, also found that racial and socioeconomic disparities in ultrafine particle exposure are larger than those observed in more commonly studied pollutants, like fine particles (PM 2.5) and nitrogen dioxide (NO2). The most comprehensive study yet of long-term ultrafine particle exposure found that concentrations of this tiny pollutant reflect the city’s decades-old racial and economic divides. ![]() New research from the University of Washington found that those effects aren’t felt equitably in Seattle. These tiny pollutants - typically spread through wildfire smoke, vehicle exhaust, industrial emissions and airplane fumes - can bypass some of the body’s built-in defenses, carrying toxins to every organ or burrowing deep in the lungs. Photo: Sarah Fish.ĭespite their invisibly small size, ultrafine particles have become a massive concern for air pollution experts. DEOHS student Magali Blanco, a co-author of the ultrafine particle study, checks mobile monitoring equipment used to gather air samples in the Seattle area. ![]()
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