The powerful winds that fanned the flames have propelled dark clouds of unhealthy pollution as far south as San Pedro.

Bangkok was ranked ninth among countries with the poorest air quality worldwide on Thursday. The capital’s air quality index ...

Senate Bill 703 went into effect banning nearly all agricultural burning to help limit air pollution, but farmers say the new practice is exceedingly more expensive.

A federal complaint alleges the company sold  "aftermarket defeat devices" that eliminate or bypass emissions controls for certain vehicles.

Wildfires raging around Los Angeles mean air quality has plummeted. What's the risk for everyone breathing that air -- and how can people protect themselves?

The Port of Seattle’s Sustainable Airport Master Plan (SAMP), a proposal to expand Sea-Tac Airport with 31 construction ...

Massive wildfires burning in the Los Angeles area have filled the air with a thick cloud of smoke and ash, prompting air ...

New bills proposed by Inland Empire lawmakers would void new fuel standards, remove taxes from tips and bolster ...

Oregon environmental regulators gave a key stamp of approval to a proposed $2.5 billion biofuel refinery along the Columbia ...

As thousands of acres burn across Southern California, wildfire smoke is causing poor air quality in the region and beyond.

Advocates for limits on indiscriminate outdoor lighting that are increasingly obscuring night skies worldwide are recognizing ...