Anthopogenic emissions of air pollution include but are not limited to: A: Vehicular Transportation B: Forest Fires C: Unpaved roads D: Electricity Generation by Fuel Combustion E: The use of paints, spilled gasoline, and other VOCs.

Many practical areas of engineering controls designed to mitigate exposure of surface mine workers to all airborne dusts, including silica, are： A: drill dust collection systems B: enclosed cab filtration systems C: controlling dust on unpaved haulage roads D: controlling dust at the primary hopper dump