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NO2 (nitrogen dioxide) - primary or secondary pollutant?

Back

Primary pollutant: A pollutant that is emitted directly from a source.

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Acid rain - primary or secondary pollutant?

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Secondary pollutant: A pollutant that forms in the atmosphere through chemical reactions.

Front

Lead - primary or secondary pollutant?

Back

Primary pollutant: A pollutant that is directly emitted from sources such as vehicles and industrial processes.

Front

Which law gives the EPA the power to regulate air pollution?

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Clean Air Act: A federal law designed to control air pollution on a national level.

Front

Volatile organic compounds (VOCs) are...

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Organic chemicals that form toxic fumes and can contribute to air pollution.

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What is the main source of nitrogen oxides (NOx) in the atmosphere?

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Combustion of fossil fuels in vehicles and power plants.

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What are particulate matter (PM)?

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Tiny particles of liquid or solid matter suspended in the air, which can harm human health.

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What is the greenhouse effect?

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The warming of Earth’s surface due to the trapping of heat by greenhouse gases.

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What are the health effects of air pollution?

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Respiratory diseases, cardiovascular problems, and increased mortality rates.

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What is smog?

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A type of air pollution that is a mixture of smoke and fog, often exacerbated by temperature inversions.