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> 毛乌素沙漠在汉朝时还是水草丰美的大草原，现在已变成一片沙漠，其人为原因是 A.气候由湿润向干旱转变 B.植被由草原向荒漠退化 C.农业由耕种向畜牧转变 D.人类过度开垦和放牧对植被的破坏

问题：

发布时间：2024-09-12

毛乌素沙漠在汉朝时还是水草丰美的大草原，现在已变成一片沙漠，其人为原因是

A.气候由湿润向干旱转变
B.植被由草原向荒漠退化
C.农业由耕种向畜牧转变
D.人类过度开垦和放牧对植被的破坏

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