1.Past vast areas in Northwest China,Provincial Health trees to logging,many people cut down trees,the trees do not amount to much.More and more farmland into desert.2.Whenever whipped up winds,dry sand and sandy formation of sandstorms,the survival environment to become worse and worse.3.This gives us food for thought,should immediately gets jujube,the construction of the "green wall" to prevent desertification.The faster the better.Not very accurate 1.Past vast areas in Northwest China,Provincial Health trees to logging,many people cut down trees,the trees do not amount to much.More and more farmland into desert.2.Whenever whipped up winds,dry sand and sandy formation of sandstorms,the survival environment to become worse and worse.3.This gives us food for thought,should immediately gets jujube,the construction of the "green wall" to prevent desertification.The faster the better.Not very accurate