The following essay will be looking at the factors that cause pollution, and the effect that pollution has on our world today. It will also investigate what it has in store for the future if things do not improve. It will also explore some of the methods used to treat and clean-up wastewater, and oil spills.
Today, the industrialization of Canada is severely affecting this nations lakes, streams, and rivers. If something is not done to improve the situation it is going to have some severe environmental problems in its future.
Today pollution is very high in both inland and marine waters. All different types of water pollution are contributing factors in this problem. Here are some things that are associated with pollution:
Pathogens: Pathogens are disease causing bacteria, viruses, and protozoa. They usually come from human sewage. As pathogen numbers increase, so does the risk of human health.
Biochemical Oxygen Demand: Organic wastes that decay in a body of water.
decrease the amount of oxygen found in it. The living things in the lake need oxygen to survive. If the oxygen level is depressed to zero, all fish in the lake die. Any decomposition that does not contain oxygen starts to generate noxious gases such as Hydrogen Sulfide. Pulp and paper mills, and municipal sewage causes BOD.
Nutrients: Nutrients, particularly nitrogen and phosphorus, enrich waters and accelerate the aging of lakes and streams. Also, the result of this is rich plant life which prohibits recreational activities. Plankton blooms depress oxygen levels (as mentioned before) and therefore, endanger living organisms. Major sources of nutrients are municipal sewage and agricultural runoff.
Toxic Materials: Can affect the health of aquatic organisms and their consumers, and the people who drink the contaminated water. The toxicants include lead, mercury, DDT, PCB, benzopyrene,