What is a landfill?, An area where trash is buried, A type of pollution, A water treatment plant, A recycling center, Which gas is a major greenhouse gas?, Hydrogen, Nitrogen, Carbon Dioxide, Oxygen, What causes ozone depletion?, CO₂, Oxygen, Methane, CFCs, A dead zone is caused by:, Too much oxygen, Excess nutrients causing algal blooms, Too many fish, Cold water, What percentage of Earth's water is freshwater?, 75%, 97%, 3%, 50%
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Multiple Choice Human Impact
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