The three main anthropogenic sources of gaseous air pollutants in the United States are soil erosion, volcanoes, and forest fires soil erosion, volcanoes, and forest fires A soil erosion, volcanoes, and energy production soil erosion, volcanoes, and energy production B industry, construction, and agriculture industry, construction, and agriculture C industry, transportation, and energy production industry, transportation, and energy production D industry, transportation, and agriculture

C. industry, transportation, and energy production

Explanation:

Gaseous pollutants are air pollutants. More completely, we can consider that gaseous pollutants are particles of different sizes in the form of vapors that invade the atmosphere mixing with the air and being breathable by living beings, causing several problems. The main promoters of this type of pollution in the USA are the industry, transport and energy production, which pollute the air, mainly, through the burning of fossil fuels, allowing their harmful substances to be thrown into the atmosphere.

answer; round wood logs, building materials like (plywood),also pulp and paper products;