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 ...

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 ...

Posts from this topic will be added to your daily email digest and your homepage feed. The EPA proposed tightening restrictions on soot in the air. Advocates are pushing for the agency to get tougher.

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 ...