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Which of the following is the main reason why only a limited amount of the Earth's water is available for human use?
Which of the following is the main reason why only a limited amount of the Earth's water is available for human use?
What percentage of the Earth's water is available for human use?
What percentage of the Earth's water is available for human use?
Which of the following is NOT a reason why only a limited amount of the Earth's water is available for human use?
Which of the following is NOT a reason why only a limited amount of the Earth's water is available for human use?
Which of the following is the largest reservoir of freshwater on Earth?
Which of the following is the largest reservoir of freshwater on Earth?
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What percentage of the Earth's water is found in the oceans?
What percentage of the Earth's water is found in the oceans?
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Which of the following is NOT a source of freshwater?
Which of the following is NOT a source of freshwater?
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