groundwater pollution etc 地下水污染等
It has many advantages: high yield, no circumstance pollution etc.
该方法不仅产率高，而且还避免了环境的污染。
Forest is playing a vital role in maintaining natural ecological balance, improving ecological environment, preventing and remedying pollution etc.
森林在维持自然生态平衡、改善生态环境、防治污染等方面具有极其重要的功能。
There are some problems to await to settle in the traditional produce craftwork of vanillin for instance high cost, low yield, the complex craftwork and serious waste pollution etc.
传统的香兰素生产工艺普遍存在着成本高、收率低、工艺复杂及三废污染严重等有待解决的问题。
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