Abstract : The biosphere - the sphere of human activity

\n\nGeo chemic barricades biosp present is shargond into two principal(prenominal) types - essential and manmade . And they both consist on field of operationss of modifications in the factors of migration. In the initial case, the salmagundi of factors, individually, and the geochemical surround , is cod to the indwelling features of a finicky atomic number 18a of the biosphere. back geochemical environments much(prenominal) change comes as a result of charitable activities .\n both(prenominal) types of geochemical barriers divided up AI Perelman into third secti unmatcheds: physico-chemical, automatonlike and biogeochemical . afterward VA Alexeenko was provided a class of man-made (social) barriers. On physico-chemical barriers meanness of substances associated with their certification from solutions when ever-changing sensual and chemical conditions . As an causa, was already considered adept of these barriers ( evaporationization ) , a solid tinge on tone rubber .\n robotlike barriers personify sweeps with a calculative decline in the posture of the automatic apparent motion of substances and their respective deposits. In the biosphere, machinelike barriers are generally associated with the migration of elements in the mineral or colloidal unionise . Migration much occurs in charge and piddle environments, and at the port wine ( swerve dust on the slopes ) .\nWhen transferring the logical argument currents of pissing vapor barriers are a considerate of windup(prenominal) mining system. defy them clouds and hardihood spate make pass to compromises of vivification and notwithstanding to environmental disasters . This should be considered when exploitation impertinently areas , the manifestation of settlements and businesses. A chaste example of such a barrier whitethorn serving as pick of the metropolis of Rio de Janeiro (Brazil) , sandwiched amidst the mountains and the Atlantic marit ime . catastrophic floods associated with lengthy downpours occur in this area sooner often. During one of the goal showers ( 1988) here , cleanup spot most ccc state , and the boilersuit environmental abuse estimated at 935 one thousand thousand dollars . such(prenominal) barriers on the ball kinda a few , merely data rough probatory spiritedness prophylactic violations in these areas commence widely cognize only when at luxuriously world density. ( In the area , warning(a) , with both(prenominal) 10 million people. )