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because harmful substances often chemicals or microorganisms contaminate a stream, river, lake, ocean, aquifer, or other body of water, degrading water quality and rendering it toxic to humans or the environment.
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Hope This Helps!!!
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Navigable rivers and geographical conditions.
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Rivers and moderate distances between the countries have been an advantage for Europe because it makes it easy to transport goods all across the realm. Rivers and canals provided transportation routes for goods and people. Rivers use to transport goods between coastal harbors and the inland, aiding economic growth, and they bring people and goods together.
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Explanation:
The Dust Bowl of the 1930s was caused by erosion, overgrazing, fertilizer runoff & the clearing of grasslands.
The Red Power Movement, also known as the American Indian Movement<span> (AIM), was dedicated to getting the Federal Government of the United States to return land that was previously owned by the Native Americans. In 1969 Native Americans tried to regain Alcatraz Island which was once a part of their native territory.</span>