The soil pollution

The soil is very significant to our life and health. First, the composition of the soil is the deciding factor of the underwater quality. Second, the waterlogged fields are inappropriate for agriculture and housing. In addition, the territories and regions suffering from lack or overstock of chemical elements are called the anomalous geochemical regions. As a result of the chemical imbalance, there is the high risk to catch the endemic disease in these regions.
The main sources of the soil pollution are industry, agriculture, transport, housing development, etc. Consequently, the soil is polluted by the waste from factories and settlements, by chemicals used in agriculture and effluent.
The fertilization helps us to raise the crop capacity of the soil. Undoubtedly, it creates the possibility to have the bumper-crop year and gather in the rich harvest. On the contrary, the organic elements especially from the effluent create very beneficial conditions for pathogenes reproduction and the intensification of putrefaction. Also they exude the nasty smell and harmful gas. The pathogenic microorganisms and viruses can infiltrate into the deeper layers of the soil and even into the underwater. Thereby, people drinking such water can catch the diseases and become ill.
The pathogenic microbes get into the soil with ordure, urine, waste, effluent, etc. The pathogenes usually die or lose their virulence if there are no good conditions for their evolution. The biggest number of saprophytes is up to depth of ten centimeters and the number of them is gradually decreasing in the deeper layers of the soil.
The life-time of bacteria in the soil is very various. For instance, typhus and paratyphus pathogenes lives-up to 400days, dysentery-up to 100days, cholera -up to 15days, brucellosis -up to 60days, poliomyelitis -up to 150days. In comparison, the sporangium bacteria such as pathogens of anthrax and botulism can survive in the...

Daugiau informacijos...

★ Klientai rekomenduoja

Šį rašto darbą rekomenduoja mūsų klientai. Ką tai reiškia?

Mūsų svetainėje pateikiama dešimtys tūkstančių skirtingų rašto darbų, kuriuos įkėlė daugybė moksleivių ir studentų su skirtingais gabumais. Būtent šis rašto darbas yra patikrintas specialistų ir rekomenduojamas kitų klientų, kurie po atsisiuntimo įvertino šį mokslo darbą teigiamai. Todėl galite būti tikri, kad šis pasirinkimas geriausias!