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Combustible dust explosion hazards exist in a variety of industries, including food (e.g., candy, starch, flour, feed), plastics, wood, rubber, furniture, textiles, pesticides, pharmaceuticals, dyes, coal, metals (e.g., aluminum, chromium, iron, magnesium, and zinc), and fossil-fuel power generation.
Plywood Dust - Inhaling dust from any type of wood can be unhealthy, but dust from treated lumber is especially toxic. Keep in mind that whatever chemicals were used to treat the lumber will also be in the dust released. Always wear a good dust mask and safety glasses when cutting treated lumber.