Pollution is when harmful materials, natural or manmade, enter the environment.
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There are numerous ways pollution can be released into the environment such as creating electricity through burning coal, using pesticides for farming or even ash released from volcanic eruptions. pollution can be broken down into 3 main types: air pollution, water pollution, and land pollution.
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McDaniel, M., Sprout, E., Boudreau, D., & Turgeon, A. “pollution.” National Geographic https://www.nationalgeographic.org/encyclopedia/pollution/. Accessed August 13, 2019
