本文对如何减少畜牧养殖对环境污染的方法和途径进行了探讨和评介。
In the article, the methods and ways of how to reduce environment pollution caused by live-stock cultivation are explored and reviewed.
介绍了如何从废镍催化剂中提取镍，减少环境污染，降低硫酸镍的制造成本。
The paper mainly introduces how tonickel from waste nickel catalyst, so as to reduce environmental pollution and production cost.
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