Earth
From where does 90% of the water vapor in the air come?
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What makes Florida's Tampa Bay a unique aquatic environment?
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From which does the Global Positioning System receive its information?
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What polluting material can choke an animal by getting caught around its neck?
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A vine disease caused by a fungus that attacks the green part of the vine is called?
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What acidic precipitation occurs when sulfur dioxides build up in the clouds?
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