New measurements demonstrate that smoke particles in the upper atmosphere are twice the size of lower-altitude ones.

Across the western U.S., wildfires and the dangerous smoke that results have increased in frequency and intensity since the ...

LANSING, MI — Michigan regulators are asking the U.S. Environmental Protection Agency to discount several high-ozone days ...

Editor's note: This story has been updated to reflect the current wildfire smoke conditions in the U.S. The original story was published Jan. 8, 2025. Smoke from Canadian wildfires continued to prompt ...

New research from the University of Vermont reveals exposure to smoke from Canadian wildfires in the summer of 2023 led to ...

New research from the University of Vermont reveals exposure to smoke from Canadian wildfires in the summer of 2023 led to ...

This story is updated to reflect the current wildfire smoke conditions in the U.S. The original story was published Jan. 8, 2025. Smoke from the Bear Gulch fire in Olympic National Park drifted ...

As Canadian wildfires spread smoke across the U.S. the air pollution is dangerous to health. But there are ways to protect yourself. Here's what... Editor's note: This story has been updated to ...