Low dissolved oxygen concentrations that occur in many bodies of water when nutrients stimulate the growth of algae that subsequently die and are decomposed by oxygen-using bacteria.
Im pretty sure its the second one. In dense seawater
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D. the richness of the soil enables the Andean countries to export a wide variety of crops.
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Answer:
the December solstice occurs when Earth is near its perihelion , or closest point to the sun , around which time we're moving fastest in orbit .
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Explanation:
Wastewater can contain physical, chemical and biological pollutants. Households may produce wastewater from flush toilets, sinks, dishwashers, washing machines, bath tubs, and showers. ... After treatment at a wastewater treatment plant, treated wastewater (also called effluent) is discharged to a receiving water body.
