Surprising source of air pollution overtakes gas vehicles to become biggest toxin in US city
Scientists have discovered a hidden source of pollution in Los Angeles that contributes about 60 percent to the toxins in city air during the summer months. The new study led by the University of California, Berkley found that the over 10 million trees throughout LA are releasing harmful compounds that react to form 'smog,' which can cause allergic reactions or organ damage in high concentrations. Worse, many of these emissions are released when vegetation endures hot temperatures, which triggers them to release the compounds as a way to cope — meaning the issue could magnify as climate change smashes heat wave records.
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