At the height of the Los Angeles County wildfires, atmospheric concentrations of lead, a neurotoxin, reached 100 times ...
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Hazy view of S. Korean cityThe sky over Seoul is hazy due to air pollution on Jan. 21, 2025. The atmospheric level of PM10, harmful particles that are ...
Under the U.N. rules at the time, the U.S. withdrawal took three years to take effect, allowing former President Joe Biden to ...
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