Cambio climatico desertificacion y deforestacion en mexico

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Cambio climatico desertificacion y deforestacion en mexico

  1. 1. CAMBIO CLIMÁTICO, DESERTIFICACIÓN YDEFORESTACIÓN EN MÉXICO.Equipo #9 “Lealtad”
  2. 2. Climate changeIt is a fact that the climate change being alteredt thisone significantly.
  3. 3.  The different climatic types and his location in theterrestrial surface obey certain factors, being theprincipal ones, the geographical latitude, thealtitude, the distance to the sea, the orientation ofthe terrestrial relief with regard to the sunstroke(slopes of sunlight and shady) and the direction ofthe winds (slopes of Lee and windward) andfinally, the marine currents. These factors and hisvariations in the time produce changes in theprincipal constituent elements of the climate thatalso are five: atmospherictemperature, atmosphericpressure, winds, dampness and rainfalls.
  4. 4. A change in theemission of solarradiations, in thecomposition of theatmosphere, in thedisposition of thecontinents, in themarine currents orin the orbit of theEarth can modifythe distribution ofenergy and thethermalbalance, alteringthis way deeply theclimate when it is aquestion ofprocesses of longduration.
  5. 5.  The human influence on the climatein many cases is considered to bean external raping since hisinfluence is more systematic thanchaotic but also it is true that theHomo sapiens belongs to the ownterrestrial biosphere being able tobe considered to be also internalrapings according to the criterionthat should be used.
  6. 6. Deforestation and desertification.Our forests vanish and with them all the species thatthey them live thanks to this.
  7. 7. Mexico is one of the countrieswith major biodiversity in theplanet, and a great part of thisbiodiversity depends on theforests and jungles. This naturalwealth has had an expression inthe cultural area, where multiplecultures have createdsocial, cultural and artistic formsconcerning this ecosystem.Today, this is in risk.
  8. 8.  The deforestation carries a drastic decrease in thewater supply to local and national scale.Likewise, there breaks the climatic balance toregional and even planetary level, which irritates thethreat that represents the global climate change.In Mexico, the principal reason of deforestation is thechange of use of soil to turn the forests intoherdsmen or fields of culture
  9. 9.  The desertification can be reason or effect of theprocess of aridización. Originally this happens inthe zones that are fertile, where the sequentialagriculture is practised. The increase of thepopulation forces to an intensive exploitation of thearea until his depletion takes place. The secondstage begins when the soil stops being fertile and istaken off of his vegetable cover, the water and thewind erode it more rapid up to coming to the rock.In most of the zones of culture the soil erodes muchmore fast than it delays in being formed. Theymight need decades or centuries in order that thelandscape was returning to cover of green.
  10. 10.  According to the Program of theUnited Nations for theEnvironment (PNUMA), thedesertification threatens to thefourth part of the planet, affectsdirectly more than 250 millionpersons and puts in danger themeans of life of more than 1 000million of inhabitants of morethan 100 countries on havingreduced the productivity of thetoerras destined for theagriculture and the ranching.These persons include many ofthe poorest countries, moreunderprivileged persons and thepolitically weaker citizens.Though the desertification can beprovoked by the droughts, ingeneral his mainspring is thehuman activity: the culture andthe shepherding exceivos, thedeforestation and the lack ofirrigation.

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