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In poor, dry regions, untreated wastewater is the only viable irrigation source to keep farmers in business.
出自-2016年6月阅读原文
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But frequently untreated human waste harvested from lavatories is delivered to farms and spread as fertilizer.
出自-2016年6月阅读原文
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But Pay Drechsel, an environmental scientist, argues that the social and economic benefits of using untreated human waste to grow food outweigh the health risks.
出自-2016年6月阅读原文
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In poor, dry regions, untreated waste water is the only viable irrigation source to keep farmers in business.
2016年6月六级真题(第二套)阅读 Section C