1) A colorless, odorless gas that decreases the blood's ability to carry oxygen. It can cause faintness, death. a) Nitrogen oxides b) Ground-level ozone c) Carbon monoxide d) Sulfur dioxide 2) ______________ ______________ is produced when fuels containing sulfur are burned in the presence of oxygen. a) Carbon dioxide b) Sulfur dioxide c) Carbon monoxide d) Greenhouse gas 3) Used on factory stacks to remove gases and particulate matter. a) Filters b) Emission reducers c) Scrubbers d) Filter Strips 4) Source of carbon monoxide. a) Incomplete combustion of fossil fuels b) Combustion of fossil fuels c) Decomposition of plant and animal matter d) Photochemical reaction of CO2 5) An air pollution prevention mechanism found in vehicles. a) Combustion chamber b) Electrostatic precipitator c) Scrubber d) Catalytic converter 6) What is a primary pollutant? a) Pollutant that is put directly into air by human activities b) Pollutants that react with other primary pollutants 7) A type of pollution found both indoors and outdoors, which includes pollen, dander, soot, carbon and dust. a) Water droplets b) Allergens c) Particulate matter d) Combustibles 8) This primary pollutant creates a reddish brown gas creating photochemical smog and tropospheric ozone. a) Sulfuric acid b) Volatile organic compounds (VOCs) c) Nitrogen dioxide d) Particulate matter 9) This atmospheric compound is critical to the planet in its protection against UV radiation, but when found close to the ground is part of photochemical smog that can cause serious health problems. a) Particulate matter b) Carbon monoxide c) Stratospheric ozone d) Tropospheric ozone 10) Electrostatic precipitators can be used to remove this type of air pollutant. a) Volatile organic compounds (VOCs) b) Sulfur dioxide c) Particulate matter d) Ground level ozone 11) What is a secondary pollutant? a) Pollutants that is put directly into air by human activities b) Pollutants that react with other primary pollutants

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