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In some cases, water is so scarce that farmers break open sewage pipes transporting waste to local rivers.
出自-2016年6月阅读原文
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In cases where sewage mud is used, expensive chemical fertilizer use can be avoided.
出自-2016年6月阅读原文
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Facing water shortages and escalating fertilizer costs, farmers in developing countries are using raw sewage ( ' , 下 水道污水) to irrigate and fertilize nearly 49 million acres of cropland, according to a new report—and it may not be a bad thing.
出自-2016年6月阅读原文
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Facing water shortages and escalating fertilizer costs, farmers in developing countries are using raw sewage to irrigate and fertilize nearly 49 million acres of cropland, according to a new report—and it may not be a bad thing.
2016年6月六级真题（第二套）阅读 Section C