发布网友 发布时间:2022-07-03 09:31
共5个回答
热心网友 时间:2023-11-05 21:12
The soil under our feet is also getting away from us. Removal of the natural vegetation leaves extensive tracts of land devoid of a plant cover and susceptible to wind and water erosion. Finally, desertification is accomplished. Four specific activities have been identified as major contributors to the desertification processes: over-cultivation, overgrazing, firewood gathering, and over-irrigation. The extreme seriousness of desertification results from the great difficulty in reversing or even slowing the process. Once the soil has been removed by erosion, only the passage of centuries or millennia will enable new soil to form. The tree planting is a dominant contributor to the development of the disaster. Another effective measure is to restrain the utilization of the land and to exploit the new technology to improve the proctiveness of the arable land. 在我们脚下的土地也越来越远离我们。自然植被因为缺乏土地植被和易受风蚀和水蚀而死 亡。最后,荒漠化完成。四项具体活动已被确定为对荒漠化的主要导致的过程:过度农垦, 过度放牧,薪柴采集和过度灌溉。荒漠化的极端严重性,导致减缓甚至逆转这一过程非常困 难。一旦土壤被侵蚀,只有几百年或几千年的才能抵御,使新的土壤形成。主要控制灾情发 展都归功于植树。另一个是抑制土地利用率和利用新科技来提高耕地生产率的有效措施。热心网友 时间:2023-11-05 21:12
包饺子热心网友 时间:2023-11-05 21:13
很好!热心网友 时间:2023-11-05 21:13
我才初一,我写不了那么多,你再等等吧。热心网友 时间:2023-11-05 21:14
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