APES Unit 8.1-8.8 Pollution

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What is Nonpoint Source Pollution?

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Nonpoint Source Pollution refers to contaminants that enter a water body from multiple, diffuse sources, such as runoff from agricultural fields, urban areas, and roadways.

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What is Point Source Pollution?

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Point Source Pollution is pollution that originates from a single, identifiable source, such as a discharge pipe from a factory.

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What is Biological Oxygen Demand (BOD)?

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Biological Oxygen Demand (BOD) is a measure of the amount of oxygen that microorganisms will consume while decomposing organic matter in water.

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What is Dissolved Oxygen (DO)?

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Dissolved Oxygen (DO) is the amount of oxygen that is present in water, which is essential for aquatic life.

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What is cultural eutrophication?

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Cultural eutrophication is the process by which human activities, such as agriculture and urban development, increase the nutrient load in water bodies, leading to excessive growth of algae.

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What are Persistent Organic Pollutants (POPs)?

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Persistent Organic Pollutants (POPs) are toxic chemicals that adversely affect human health and the environment, and they persist in the environment for long periods.

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What is thermal pollution?

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Thermal pollution is the degradation of water quality by any process that changes ambient water temperature, often due to industrial discharges.

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What is the impact of temperature on dissolved oxygen levels in water?

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Higher temperatures generally decrease the solubility of oxygen in water, leading to lower dissolved oxygen levels, which can harm aquatic life.

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What is the significance of fish populations in relation to BOD and DO?

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Fish populations are often lower in areas with high BOD and low DO, as these conditions indicate poor water quality and insufficient oxygen for survival.

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What are the dangers of consuming large fish like tuna and shark?

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Large fish can accumulate high levels of mercury and other toxic substances due to biomagnification, posing health risks to humans.