中国人如何用40年时间跟沙漠抗衡，耗资数百亿的三北防护林，如今怎样了？#三北防护林#沙漠治沙#腾格里沙漠
Synopsis
沙海代码：当三北工程给每粒沙贴上“数字标签”，从种苗检疫到光伏治沙，中国用“生态算法”重写沙漠生存法则！
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