Thereasonsforthechangesarecomplex.Itisclearthatpollutionoftheairandwaterbyfactoriesisaffectingtheenvironment.Treesandothervegetationdie,andsosoiliseroded.themoretreesthatdie,thelesswaterisheldintheearth.theneedforwoodforfuelandbuildingsleadstofurtherdeforestation,whichcausesfurthersoilerosion.Localfarmersfinditmoreandmoredifficulttomakealiving.theyendupusinginefficientfarmingmethods,whichagainleadstosoilerosion.
出自：国家开放大学开放英语
提示：
同一【IP】的非会员用户每天可免费获取10次答案
收藏本站【zk.995w.com】，下次访问不迷路
本站试题总数:【10245188】个 (题库试题定时更新)
