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题库 / Prep2007E1-SC-124
Whereas the use of synthetic fertilizers has greatly expanded agricultural productivity in many parts of the world, an increase in their use can create serious environmental problems such as water pollution, and their substitution for more traditional fertilizers may accelerate soil structure deterioration and soil erosion.
an increase in their use can create serious environmental problems such as water pollution, and their substitution for more traditional fertilizers
an increase in their use can create serious environmental problems like water pollution, and if substituted for more traditional fertilizers, it
if these fertilizers are used increasingly, they can create serious environmental problems such as water pollution, and if used as substitutions for more traditional fertilizers, they
the increased usage of these fertilizers can create serious environmental problems such as water pollution, while if substituted for more traditional fertilizers, this substitution
the increased usage of these fertilizers can create serious environmental problems like water pollution, while their substitution for more traditional fertilizers
化肥（化肥是无辜的）本身是不会造成环境恶化，或造成土壤退化加速的，只有人【加速使用】化肥或者人【替代】传统肥料为化肥这两件事，才会导致环境恶化。类似的有一道og的题目，说fossil fuel 或 human 或 human's burning fossil fuel 这三者谁会造成空气质量变差----选最后一个。
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🐎一下！
但是这个usage是increased的呀，不仅仅是usage
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