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Photo 1 - rain erosion in sedimentary terrain. Source: http://www.sxc.hu Geography Humans depend on the maintenance of natural resources for their survival. However, acting oblivious to everything, as if their lives did not depend on certain factors that make it possible on earth such as soil to produce food, water quality, both to quench thirst and hygiene, as well as for the production of their food on to day, fresh air, among other resources, that affect disadvantaged consequently others. Human actions have caused much damage to the environment, such as the extinction of animal and plant species, soil degradation, causing erosion, desertification and salinization, degradation of water resources, soil and water by various chemicals, and many other acts . There are several consequences of land degradation. Consider some of the erosion, desertification and soil salinization. Erosion The process of land degradation is comprehensive. First is the degradation of the vegetation that is removed for the land use for agriculture or livestock. With the removal of vegetation, we also degradation of water resources, as the springs, rivers and lakes, are unprotected riparian vegetation and siltation occurs. Slowly the erosion process will intensify and soils become less and less fertile as they lose their nutrients, a fact that directly affects the quality of life of local people. The erosion, i.e. transport of soil particles by water or wind is a natural phenomenon. Although erosive agents already affected the soil before starting your action man, the loss of particles was compensated by the formation of the natural soil and natural vegetation. With the activities performed by humans, the risk of erosion increases as the pressure led to a holding food in some areas of intense, and this exceeds its capacity. Soil erosion causes loss of nutrients and organic matter, changes in texture, structure and decreases in infiltration rates and water retention. This process reduces the productivity of land, which leads to an increased use of chemical fertilizers in agricultural production. (See more on this topic in the leaves: "You take poison?"). According to the Environmental Quality Program of the Brazilian Agricultural Research Corporation (Embrapa) in Brazil, soil losses by erosion already reach 840 million tons per year (t / year) and are increasing with the opening of new farming in Central west and the Amazon. Source: Bley Jr. www.ecoltec.com.br/pub4.html Are Humans Rational. Will?
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Slika 1 - kiše erozije u sedimentne terenu. Izvor: http://www.sxc.hu Geografija Ljudi ovise o održavanju prirodnih resursa za opstanak. Međutim, postupajući nesvjesni svega, kao da su im životi ne ovisi o nekim čimbenicima da bi bilo moguće na zemlji, kao što su tlo za proizvodnju hrane, kvalitete vode, kako utažiti žeđ i higijene, kao i za proizvodnju hrane na njihovom na dan, svježi zrak, među ostalim izvorima, koji utječu na socijalno ugrožene posljedično drugima. Ljudske aktivnosti su prouzročili mnogo štete na okoliš, kao što su izumiranja životinjskih i biljnih vrsta, degradacija tla, uzrokujući eroziju, dezertifikacije i zaslanjivanja, degradacije vodnih resursa, tla i vode po raznim kemikalijama, i mnoge druge akte . Postoji nekoliko posljedice degradacije zemljišta. Razmotrite neke od erozije, pustinja i zaslanjenosti. Erozija Proces degradacije zemljišta je konačan. Prvo je degradacija vegetacijom koja je uklonjena za korištenje zemljišta za poljoprivredu i stočarstvo. Uz uklanjanje vegetacije, mi također degradacija vodnih resursa, kao što su izvori, rijeke i jezera, nezaštićeni priobalna vegetacija i zaslanjivanje događa. Polako proces erozije tla će se intenzivirati i postaju sve manje i manje plodni kao oni gube svoje hranjive tvari, a činjenica da se izravno utječe na kvalitetu života lokalnih ljudi. Erozije, odnosno prijevoz čestica tla vodom ili vjetrom je prirodni fenomen. Iako erozivnih agenti ionako utjecati na tlo prije početka akcije čovjeka, gubitak čestica nadoknađen formiranja prirodnog tla i prirodne vegetacije. S djelovanjem ljudi, povećava rizik od erozije, kao pritisak dovelo do drži hranu u nekim područjima intenzivne, a to premašuje njegov kapacitet. Erozija tla uzrokuje gubitak hranjivih tvari i organske tvari, promjene u teksturi, strukturi i smanjuje na infiltraciju stopama i zadržavanje vode. Ovaj proces smanjuje produktivnost zemljišta, što dovodi do povećane upotrebe kemijskih gnojiva u poljoprivrednoj proizvodnji. (Vidi više o ovoj temi u lišću: "Vi se otrov?"). Prema okoliša kvalitetan program od brazilske Agricultural Research Corporation (Embrapa) u Brazilu, tlo gubici po erozije je već do 840 milijuna tona godišnje (t / godišnje), a raste s otvaranjem novog uzgoj u Srednjoj zapadu i Amazona. Izvor: bley Jr. www.ecoltec.com.br/pub4.html Jesu li ljudi Rational. Hoće li?