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Water Pollution

Water Consumes almost 75% of earth's surface and is undoubtedly our most precious natural resource that exists on our planet today. There won't be any living organism on our planet without water. Water Pollution occurs when a body of water is severely affected due to addition of large amount of materials to the water.[Missouri Botanical Garden]
Pollutions such as sewage and fertilizers contain nutrients such as nitrates and phosphates. At high levels, nutrients can over stimulate the growth of aquatic plants and algae. Excessive growth of these types of organisms consequently clogs our waterways, use up dissolved oxygen as they decompose, and block light to deeper waters.[David Krantz] This could be very harmful to aquatic organisms as it affects the respiration ability of fish and other creatures of the sea. Pollution is also caused when silt and other suspended solids, such as soil, washoff plowed fields, construction and logging sites, urban areas, and eroded river banks when it rains.[David Krantz] Pollution in the form of organic material enters waterways in many different forms as sewage, as leaves and grass clippings, or as runoff from livestock feedlots and pastures. When natural bacteria and protozoan in the water break down this organic material, they begin to use up the oxygen dissolved in the water. Many types of fish and bottom-dwelling animals cannot survive when levels of dissolved oxygen drop below two to five parts per million. When this occurs, it kills a lot of aquatic organisms which leads to unbalance in our food chain. Pathogens are another type of pollution that can be very harmful. They can cause many illnesses such as minor respiratory and skin diseases. Pathogens include such organisms as bacteria, viruses, and protozoan. These pollutants enter waterways through untreated sewage, storm drains, septic tanks, runoff from farms, and particularly boats that dump sewage. Though microscopic, these pollutants have a tremendous effect...