Science
Smoky Skies Across North America
A week of smoky skies across North America due to brown carbon from wildland fires worsened air quality in parts of the U.S. and Canada.
Coverage timeline — 1 article
NASA
Brown carbon, emitted by wildland fires and tracked over the span of a week in July 2026, worsened air quality in parts of the U.S. and Canada.
2026-07-22 04:00 UTC