Why were many towns built near rivers?, For water, For gold, For mountains, For airports, What is a cause of river pollution?, Tree roots, Untreated sewage, Clean rain, Fresh air, Which source can pollute rivers with chemicals?, Libraries, Playgrounds, Museums, Factories, What can farm chemicals cause in rivers?, More oxygen, Stronger fish, Algae growth, Clear water, What happens when algae die?, Fish multiply, Water freezes, Oxygen drops, Rocks melt, What produces acid rain gases?, Catching fish, Washing clothes, Planting trees, Burning fuels, What does acid rain harm?, Fish and trees, Sand only, Clouds only, Road signs, How can factories help prevent river pollution?, Add pesticides, Treat wastewater, Dump rubbish, Burn more coal, Why did the Thames become cleaner?, More oil ships, More factory waste, New sewage works, Less river water, Why are clean rivers important?, Dirtier homes, More smoke, Fewer animals, Healthy environment
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Polluted Rivers
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Mrferrufino
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