人口危机
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人口危机
  据英国《每日电讯报》2月3日报道,澳大利亚碳农业大会日前在悉尼举行,与会科学家警告称,全球肥沃土壤将在60年内消失,人类因此将面临新的粮食危机。
    科学家们警告说,全球肥沃土壤正以比自然补充更快的速度消失,最后导致表层土壤变得贫瘠。每年大约有750亿吨土壤流失,世界上80%的适合耕作的土地都遭到中度或者严重侵蚀。而管理不当和过度耕作导致的侵蚀、气候改变以及日益增加的人口,都是全球肥沃土壤流失的主要原因。
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