Ash and particulate from a wildfire obscure the Los Angeles skyline as seen from Griffith Observatory in August 2021. (Brian van der Brug / Los Angeles Times) Declaring that current standards are no ...

Late last week, the Environmental Protection Agency proposed tighter limits to one of the country’s most dangerous air pollutants: fine particulate matter, or soot. But while the long-awaited move ...

The Environmental Protection Agency announced a new rule on Wednesday to significantly reduce the level of air pollution known as particulate matter (PM) by updating the national air-quality standards ...

WASHINGTON — Houston's sprawling refining and petrochemical complex could soon be facing greater restrictions on air pollution, as the Biden administration seeks to reduce the concentration of fine ...

The diesel engine emits exhaust particles that pose a unique set of measurement requirements. To document the state–of–the–art of measurement technology and to improve measurement quality, the Smoke ...

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Declaring that current standards are no longer sufficient to protect public health, the Environmental Protection Agency has proposed strengthening federal rules for one of the world’s most dangerous ...

The announcement marks the first update to the standards in 12 years. The Environmental Protection Agency announced a new rule on Wednesday to significantly reduce the level of air pollution known as ...