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EPA Tightens Rules On Some Air Pollution For the First Time In Over a Decade

The U.S. Environmental Protection Agency (EPA) today unveiled new, stricter limits for PM2.5 (particulate smaller than 2.5 micrometers in diameter), commonly referred to as soot. As NPR notes, these particles are are "one of the deadliest types of air pollution." From the report: The agency lowered...

The U.S. Environmental Protection Agency (EPA) today unveiled new, stricter limits for PM2.5(particulate smaller than 2.5 micrometers in diameter), commonly referred to as soot. That's a "significant reduction," says Regan Patterson, an air pollution expert at the University of California, Los Angeles. The sources vary: fossil fuel combustion, agriculture, and industrial processes all add to the load, as does wildfire smoke and dust.

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