Reduction of Air Pollutants

Nitrogen oxides (NO_x) are:

• a yellow-brown gas that contributes to photochemical smog

• a colorless and odorless gas that binds to hemoglobin in blood 

• a colorless and odorless gas that damages the lungs

• a reactive gas produced, in part, by photochemical reaction of sunlight  with various air pollutants  

Which is an anthropogenic source of nitrogen oxides?

• Nuclear fission

• Combustion of natural gas

• Volcanic eruptions

• motor vehicles

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NGSS.HS-ESS3-6

NGSS.HS-LS2-7

A thermal inversion, which can lead to serious pollution events, occurs when

• warm air close to the surface is blanketed by a layer of cool air that traps pollutants.

• cool air close to the surface is blanketed by a layer of warm air that traps pollutants

• warm air rises, taking pollutants with it.

• cool air rises, taking the pollutants with it

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NGSS.HS-ESS2-2

Which piece of legislation is most likely to have caused a significant decrease in acid deposition?

• Clean Air Act

• Clean Water Act

• Kyoto Protoccol

• Montreal Protoccol

Catalytic converters in cars have been instrumental in removing which of the following pollutants from vehicle emissions?
I. NO_X
 II. CO
III. SO₄^2–

• I Only

• II only

• I,& II

• I,II,&III

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NGSS.HS-ESS3-4

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Lead emissions since the early 1980s have

• Remained about the same.

• Decreased due to lead free gasoline.

• Increased because developing countries generally do not use lead free gasoline and are using automobiles at higher rates.

Which agreement allowed for a reduction, and eventual elimination, of CFC production and use?

• Montreal Protoccol

• Kyoto Protoccol

• Paris Agreement

• Yo MaMa

Effect of sulfur dioxide

• Deprives body of oxygen

• Irritates the eyes

• Causes global warming

• Causes acid rain

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NGSS.HS-ESS2-5

Which of the following is most responsible for the change in the emissions of volatile organic compounds ( VOC) from 1970 to 2020 as shown in the graph?

• A decrease in the number of vehicles fitted with catalytic converters and an increase in the number of hybrid vehicles beginning in 1970.

• A decrease in the average driving distance in the United States from 1970 to 2020 that resulted from increased urbanization.

• An increase in air emission standards that began in 1970 that regulated corporate average fuel economy ( CAFE) standards.

• An increase in VOC emissions from car exhausts that resulted from increased driving distances from 1970 to 2020.

An experiment to evaluate the efficiency of wet and dry scrubber networks that filter particulate gas at different flow rates was conducted under different flow rate conditions. The results are shown below. Based on the data in the graph, which of the following methods would be most effective at removing the greatest amount of particulate matter from coal-burning power plant emissions?

• Dry scrubbers using a flow rate of 200 L/min are best suited to remove small particles.

• Dry scrubbers using a flow rate of 450 L/min are best suited to remove large particles.

• Wet scrubbers using a flow rate of 300 L/min are best suited to remove small particles.

• Wet scrubbers using a flow rate of 450 L/min are best suited to remove large particles.

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NGSS.HS-ESS3-4

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