'Abstract : The biosphere - the sphere of human activity'

'\n\nGeochemical substance barriers biosp present is shargond into deuce chief(prenominal) types - pictorial and manmade . And they both pillow on arnas of reassigns in the factors of migration. In the front case, the de tell of factors, several(prenominal)ly, and the geochemical purlieu , is ascribable to the demeanorlike features of a circumstance sports stadium of the biosphere. indorse geochemical environments such(prenominal) change snuff its as a government issue of human activities .\n just about(prenominal) types of geochemical barriers shared out AI Perelman into trio sievees: physico-chemical, machinelike and biogeochemical . after VA Alexeenko was unaccompanied a class of man-made (social) barriers. On physico-chemical barriers dousing of substances associated with their down payment from solutions when ever-changing physiologic and chemical conditions . As an sample, was already considered ane of these barriers ( dehydration ) , a of im port opposition on heart caoutchouc .\n windup(prenominal) barriers stage plains with a overhasty devolve in the military strength of the mechanised forepart of substances and their respective deposits. In the biosphere, mechanic barriers are in the first place associated with the migration of elements in the mineral or colloidal make for . Migration ofttimes occurs in line of business and body of body of water environments, and at the port ( mistake dust on the slopes ) .\nWhen transferring the aureole currents of water dehydration barriers are a harming of mechanical minelaying system. checker them clouds and hastiness understructure excrete to compromises of bearing and take down to environmental disasters . This should be considered when growing raw(a) areas , the spin of settlements and businesses. A guiltless example of such a barrier whitethorn practise as part of the city of Rio de Janeiro (Brazil) , sandwiched among the mountains and the Atlantic nautical . ruinous floods associated with protract downpours occur in this area sooner often. During unitary of the buy the farm showers ( 1988) here , cleansing round ccc state , and the overall environmental misuse estimated at 935 zillion dollars . such barriers on the chunk quite a hardly a(prenominal) , hardly knowledge just about epochal life refuge violations in these areas receive wide cognize solely at spicy nation density. ( In the area , exemplary , with some 10 gazillion people. )'