California study links zero emission vehicle adoption to measurable local air quality improvements
A peer-reviewed study finds that neighborhoods adding more electric vehicles see significant drops in nitrogen dioxide levels while gas cars increase pollution.
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A peer-reviewed study published in The Lancet Planetary Health has found that neighborhoods across California that added more zero-emission vehicles between 2019 and 2023 experienced measurable reductions in nitrogen dioxide levels. Researchers at the Keck School of Medicine of USC, including sandrah eckel, determined that for every 200 zero-emission vehicles (ZEVs) registered in a local area, there was a corresponding 1.1 percent drop in nitrogen dioxide (NO2). This pollutant is typically released from burning fossil fuels and is known to trigger asthma attacks, cause bronchitis, and increase the risk of heart disease and stroke.
To reach these conclusions, researchers divided the state into 1,692 neighborhoods and utilized publicly available vehicle-registration data from the California Department of Motor Vehicles (DMV). The study examined light-duty ZEVs, which included full-battery electric cars produced by companies like Tesla, Inc. , plug-in electric hybrids, and hydrogen fuel-cell cars. In contrast, the research team noted that neighborhoods that added more traditional gas-powered cars during the same period saw a rise in local pollution levels.
