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2019高考地理一轮复习第二十九讲荒漠化的危害与治理——以我国西北地区为例课件.ppt

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荒漠化的危害与治理以我国西北地区为例,第二十九讲,人类活动,土地退化,干旱,风化,低,过度放牧,盲目开垦,村庄,风沙,沙尘暴,植被,生产力,预防,综合,禁樵禁采,生态移民,三北防护林,

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