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by s0rce 1634 days ago
See here for the other sources: https://www.baaqmd.gov/~/media/files/communications-and-outr...

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39% Wood Smoke 12 Cooking 12 Other Mobile Sources 12 Road Dust 7 On-Road Motor Vehicles 6 Combustion: Stationary Sources 5 Industrial/Commercial Processes 3 Construction and Farming Dust 2 Animal Waste 1 Wind-Blown Dust 1 Wildfires

Wildfires are basically non-existent in the winter, although the Colorado fire currently doesn't bode well for future California winters.