The advisories impact large areas of Idaho, Oregon, Montana and Washington, lasting through the end of January.

The Air Quality Index measured 156 near Forks, Washington, and received a rating of "unhealthy," meaning some members of the general public may experience health effects and members of sensitive ...

Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily more accurate.

An American Airlines plane with 64 people on board collided with an Army helicopter over Washington, D.C., and crashed into ...

“We just try to stay indoors.” This week, as the wildfires raged and smoke billowed across Los Angeles, officials issued air quality alerts, schools cancelled classes and scientists warned ...

It’s not just Florida and California — from poisoned water supplies to infrastructure issues to polar vortices, Holly Baxter ...

In communities living next to factory farms, residents have long voiced their concerns about environmental pollution. Now, ...

The natural environment category is one of eight categories driving the overall Best States rankings, and encompasses metrics reflecting pollution threats and air and water quality. Learn more ...

United Airlines is rebuilding its domestic network after dropping 41 cities from its route map ... of air service. "We're excited to bring this new United Express service to the Four Corners area.

Maps show what to expect as ... and when the jet stream allows, this cold air can drop farther down into lower latitudes like in the United States. This is forecast to happen as soon as this ...