Biden Administration Strengthens Health Standard for Soot Pollution
The Environmental Protection Agency finalized a rule today to tighten one national limit for soot pollution in the United States. It set the annual health standard for soot, otherwise known as fine particulate matter air pollution, or PM2.5, at 9 micrograms per cubic meter. The standard defines how much soot pollution is medically unsafe to breathe and sets the level to which this pollution must be reduced across the country.
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