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Correct Answer: C) Filter water.
Correct Answer: B) They might get sick.
Correct Answer: C) 1 billion.
Correct Answer: D) 200, 000.
Correct Answer: C) Dried leaves.
Correct Answer: C) Secondary Pollutant.
Correct Answer: A) Acid rain.
Correct Answer: C) Sediment (soil).
Correct Answer: A) Pesticides; plant nutrients and sediment.
Correct Answer: A) The heavy and toxic metals that can be released.
Correct Answer: B) Sunlight.
Correct Answer: C) Eutrophication.
Correct Answer: D) Monkey.
Correct Answer: B) River Basin.
Correct Answer: C) Salinity.
Correct Answer: C) Cooling power plants.
Correct Answer: D) Chemical.
Correct Answer: C) Quality.
Correct Answer: A) 3%.
Correct Answer: D) Water pollution.
Correct Answer: B) 3%.
Correct Answer: C) Potable.
Correct Answer: C) When the polluted water of one's country spilling into the water of another country.
Correct Answer: A) Water.
Correct Answer: C) Point source.