For weeks, smoke from Canadian wildfires has poured down into the United States, drifting clear across the Atlantic into Europe. Pulmonologist Vivek Balasubramaniam, a professor of pediatrics at the ...

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 ...

Wildfire smoke is more than just the scent of burning wood, it’s a complex, shifting mix of thousands of gases and particles.

This coverage is made possible in part through a partnership with Grist and Interlochen Public Radio in northern Michigan. For weeks, smoke from Canadian wildfires has poured down into the United ...