Ch. 12 Air Pollution and Atmosphere Flashcard

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What is the Clean Air Act?

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The Clean Air Act is a comprehensive federal law in the United States that regulates air emissions from stationary and mobile sources to protect public health and the environment.

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What are the main components of the atmosphere?

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The atmosphere is mostly composed of Nitrogen (78%), Oxygen (21%), Argon (0.93%), and trace amounts of other gases including Carbon Dioxide and Water Vapor.

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What are particulate matter (PM) and its health risks?

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Particulate matter (PM) refers to tiny particles or droplets in the air that can be inhaled and cause serious health problems, including respiratory and cardiovascular issues.

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What causes ground-level ozone?

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Ground-level ozone is primarily formed by the reaction of vehicle emissions, Volatile Organic Compounds (VOCs), and sunlight.

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What is the impact of lead as an air pollutant?

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Lead is a neurotoxin that can affect cognition and brain development, particularly in children.

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What is photochemical smog?

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Photochemical smog is a type of air pollution that is formed when sunlight reacts with pollutants such as VOCs and nitrogen oxides, leading to the formation of ozone at ground level.

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What are Volatile Organic Compounds (VOCs)?

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VOCs are organic chemicals that can evaporate into the air and contribute to air pollution, often found in products like paints, solvents, and fuels.

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What is acid rain?

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Acid rain is precipitation that is significantly more acidic than normal, caused by sulfur dioxide and nitrogen oxides in the atmosphere, which can harm ecosystems and structures.

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What is the role of the National Environmental Policy Act?

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The National Environmental Policy Act (NEPA) requires federal agencies to assess the environmental effects of their proposed actions before making decisions.

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How does air pollution affect plant growth?

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Air pollution can damage plant tissues, reduce photosynthesis, and lead to decreased crop yields and biodiversity.

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