The pollution process in which oxygen depletion of natural waters by increased algae growth occurs because of contaminants such as excess phosphates is referred to as ________.

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Eutrophication is the pollution process that occurs when excess nutrients, mainly phosphates and nitrates, are introduced into natural water bodies causing an overgrowth of algae and other aquatic plants. This situation reduces the dissolved oxygen level in the water, making it difficult for aquatic organisms to survive. The term "eutrophication" comes from the Greek words "eu" meaning "good" or "well" and "troph" meaning "nourishment," implying that the process results in an abundance of nutrients. However, this process can lead to the death of aquatic organisms that cannot live in an oxygen-deprived environment due to the overgrowth of algae.

The Pollution Process in Which Oxygen Depletion of Natural Waters