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Getting into the bodies of people and animals, these poisons cause dysfunctions of the nervous system, brain, and even mutational processes. It is used in the metal industry, in the manufacture of batteries, gasoline, glass, insecticides, and paints.Today, fish contaminated with methylmercury regularly gets at our dining tables. The same applies to cadmium which is used at battery factories.
If the climate did not change, the rivers would not dry and the level in the lakes would not be lowered.
With the development of civilization, the natural cycle was violated.
Describe in a water pollution cause and effect essay that before the development of civilization the cycle of water in the biosphere was balanced.
The ocean received from rivers as much water as was consumed during its evaporation.
Soluble forms of these metals exist in different types of sewage.
They were found in the waters leaked from mines and dumps of scrap metal, and also from natural bogs.Droughts become more frequent, and centers of ecological disasters appear.In addition, fresh water which returns to the ocean and other water bodies from land is often polluted, practically unsuitable for drinking.For example, insecticides rotenone and DDT, pesticides 2,4-D, etc. Even if the concentration of toxic chemicals is non-lethal, these substances can lead to animal death or other harmful consequences at the next stage of the food chain.It’s worth mentioning in an essay on diseases caused by water pollution that gulls died after eating large amounts of fish containing high concentrations of DDT.Chemicals, dissolved in rainwater and absorbed by soil particles, fall into the groundwater, and then - in rivers of farmland, where they are accumulated in fish and smaller aquatic organisms.Although some creatures have adapted to these harmful substances, there have been cases of mass death of individual species, probably due to poisoning with agricultural pesticides. You may use it as a hook for water pollution essay. Without water, a human cannot live more than three days.But even realizing the importance of the role of water in his life, he still continues to rigidly exploit water objects irrevocably changing their natural regime due to a negative impact of wastes.The tissues of living organisms consist of 70% water. But 97% is the salt water of the oceans and seas, and only 3% is fresh water.Three-quarters of this 3% are almost inaccessible to living organisms since this water is "conserved" in glaciers of mountains and polar zones. As for the water available to living organisms, the bulk is in their tissues.