Particulate Matter

  • Woodsy Owl with the Natural Inquirer bee looking at caterpillar through a magnifying glass
    Welcome to Woodsy Owl LIVE, a distance learning adventure brought to you by the USDA Forest Service and the Natural…
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    Woodsy Owl LIVE

  • Woodsy Owl LIVE 3 thumbnail
    Give a Hoot, Don’t Pollute! Welcome to Woodsy Owl LIVE 3, a distance learning adventure brought to you by the…
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    Woodsy Owl LIVE 3 — Episode 1 — The Science of Air Pollution

  • Article caver for Let's Clear the Air. It is a drawing of fireman working in a forest after a fire.
    Smoke from wildland fires contains hundreds of chemicals. These chemicals can be gases, liquids, or solid forms. The effects of…
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    Let’s Clear the Air: The Danger of Forest Fire Smoke to Firefighters

  • Article caver for Let's Clear the Air. It is a drawing of fireman working in a forest after a fire.
    Smoke from wildland fires contains hundreds of chemicals. These chemicals can be gases, liquids, or solid forms. The effects of…
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    Let’s Clear the Air: The Danger of Forest Fire Smoke to Firefighters (Spanish)