修改一篇文章,急Desertificationisthegradualtransformationofhabitablelandintodesert.Desertificationisnottheadvanceofdeserts;itistheprocessoflanddegradationresultingfromhumanfactorsandenvironmentalchange.Environmenta

　　修改一篇文章,急

　　Desertificationisthegradualtransformationofhabitablelandintodesert.Desertificationisnottheadvanceofdeserts;itistheprocessoflanddegradationresultingfromhumanfactorsandenvironmentalchange.Environmentandeconomyareinterrelatedandinteractoneachother.Withthedevelopingeconomy,peopleoftencarenothingbuteconomicworthofenvironmentalresources,andforgettheintrinsicecologymeaningofenvironmentsthatmankinddependonforexistence.Itwillcausecitydevelopgiveanseriousimpacttoenvironmentmoreandmore;consequently,itwillproducetheresultofdeteriorationoftheenvironment.Desertificationhasmanyadverseeffects,suchasecological.Moreover,desertificationistheseriousenvironmentalandsocialeconomyproblems.Italsohasbeenrecognizedasamajorthreattobiodiversity.Desertificationisincreasinglyseriousintheworld.

　　InChina,desertificationhasbeenabigenvironmentproblemwhichishighlypaidattentiontobygovernment,especiallythedesertificationinnorthernChina,becausedesertificationismainlydistributeinnorthernChina.Bytheendof2003,landdesertificationinChinahas2.674millionsquarekilometers,accountingfor27.9%ofthetotallandarea,covering18provincesandthe471cities.Causedbydesertificationeveryyearindirecteconomiclossesamountedtomorethan540billionyuan.Therateofannualexpansionofdesertificationis3,436squarekilometers.Withincreasinglyfrequentduststorms,desertificationhasdrawnincreasingattention.