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What is pollution?

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Pollution is the introduction of harmful substances or products into the environment, which can cause adverse effects on health, ecosystems, and the climate.

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What are persistent chemicals?

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Persistent chemicals are substances that do not break down easily in the environment and can accumulate in living organisms, leading to long-term health effects.

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What is the relationship between dose and toxicity?

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The toxic effects of a pollutant depend on the dose to which an individual is exposed; higher doses typically result in more severe effects.

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What is cholera?

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Cholera is an infectious disease caused by the bacterium Vibrio cholerae, often transmitted through contaminated water.

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How is cholera transmitted?

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Cholera is usually contracted by drinking water polluted with human feces that contain the cholera pathogen.

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What is the Environmental Protection Agency (EPA)?

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The EPA is a U.S. government agency established to protect human health and the environment by enforcing regulations based on laws passed by Congress.

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What was the significance of Earth Day 1970?

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Earth Day 1970 marked a pivotal moment in the environmental movement, raising public awareness and leading to the establishment of the EPA.

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What is the Montreal Protocol?

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The Montreal Protocol is an international treaty designed to phase out substances that deplete the ozone layer, adopted in 1987.

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NGSS.MS-ESS3-3

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What is the difference between a virus and a disease?

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A virus is a type of pathogen that can cause diseases, while a disease is a condition that results from the infection or other factors affecting health.

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What are chronic diseases?

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Chronic diseases are long-lasting conditions that often require ongoing medical attention and can result from prolonged exposure to pollutants.

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