Tragedy of the Commons

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Tragedy of the Commons Noun

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[traj-uh-dee of thuh kom-uhnz]

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Tragedy of the Commons

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An economic issue where individuals acting in self-interest deplete a shared, limited resource, harming the entire group.

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Example: This image shows Earth's shared resources, like water, being taken for individual use. This illustrates the 'Tragedy of the Commons,' where overuse can deplete resources for everyone.

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Commons Noun

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[kom-uhnz]

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Commons

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A shared resource, such as land, air, or water, that is not privately owned and is available for public use.

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Example: This image shows a public park, which is a type of 'commons'—a resource, like clean air or open land, that is shared by everyone in a community.

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Resource Depletion Noun

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[ree-sors dih-plee-shuhn]

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Resource Depletion

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The consumption of a resource faster than it can be replenished, which leads to its scarcity or complete exhaustion.

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Example: Multiple hands grabbing for a single loaf of bread shows how a shared resource can be quickly used up when individuals act for themselves.

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Overfishing Noun

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[oh-ver-fish-ing]

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Overfishing

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The removal of a fish species from water at a rate that the species cannot replenish, resulting in population depletion.

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Example: This image shows a massive fishing net full of fish, illustrating the large-scale removal of a shared resource from the ocean, which leads to overfishing.

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Overgrazing Noun

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[oh-ver-grey-zing]

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Overgrazing

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The process where excessive animal grazing damages vegetation and land, preventing regrowth and causing significant soil erosion.

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Example: This image shows a cow eating the last patch of grass, leading to barren land and dead trees, which demonstrates how overgrazing depletes shared resources.

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Sustainability Noun

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[suh-steyn-uh-bil-i-tee]

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Sustainability

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The practice of using resources to meet present needs without compromising the ability of future generations to meet theirs.

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Example: This image shows wind turbines, a form of renewable energy, which is a strategy for achieving long-term environmental sustainability.

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Air Pollution Noun

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[air puh-loo-shuhn]

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Air Pollution

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The introduction of harmful substances, such as chemicals or particulate matter, into the Earth's atmosphere, degrading air quality.

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Example: Multiple sources like factories and buildings release pollutants into the air, a shared resource, degrading its quality for everyone in the city.

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Water Pollution Noun

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[waw-ter puh-loo-shuhn]

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Water Pollution

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The contamination of water bodies, such as rivers, lakes, and oceans, typically as a direct result of human activities.

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Example: A factory releases harmful waste from a pipe into a body of water, contaminating it and showing a direct cause of water pollution.

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Greenhouse Gas Noun

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[green-hous gas]

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Greenhouse Gas

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A gas in the atmosphere, like carbon dioxide, that absorbs and emits radiant energy, causing the warming greenhouse effect.

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Example: This image shows that livestock, like cows, release methane (CH4), a powerful greenhouse gas, into the atmosphere, linking an economic activity to a shared environmental problem.

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Carbon Cycle Noun

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[kar-buhn sahy-kuhl]

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Carbon Cycle

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The biogeochemical cycle by which carbon is exchanged among the Earth's biosphere, oceans, atmosphere, and geosphere.

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Example: This diagram shows how carbon (as CO2) moves between the air, plants, animals, and soil, including human additions from factories and cars.