The soil erosion and water loss is the source of many disasters which destroy extensive natural area and produce extremely disadvantageous negative effect on the environment of our mankind.

 
  • 水土流失問(wèn)題涉及到大面積的自然破壞,是人類(lèi)諸多災害的根源,其整個(gè)過(guò)程都會(huì )對人類(lèi)生存環(huán)境產(chǎn)生極為不利的負效應。
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