This method is characterized by simple operation and speediness without environmental pollution.
该方法操作简单、快速，不污染环境。
Natural coloured cotton is a special type of cotton with a higher ecological benefit but without environmental pollution.
天然彩色棉是一种健康无害、生态效益高的特种棉。
Research of breeding and cultivation on improvement of rice quality should be enhanced, and the use of cultural technique without environmental pollution should be encouraged.
必须加强稻米品质改良的育种和栽培研究，倡导无公害化栽培技术。
Microbial flocculants are natural biological macromolecules and biopolymers with flocculating function, high efficiency, safe, biodegradation, without environmental pollution.
微生物絮凝剂为天然生物大分子，是一类具有絮凝功能、高效、安全、无二次污染及具生物降解性的生物多聚物。
Magnetic anti-scaling method is a physical anti-scaling method in oilfield, the virtue of which is low cost, simple maintenance, easy to install management and without environmental pollution.
磁防垢是油田现场使用的一种物理防垢方法，特点是成本低、维修简单、安装管理方便，不会造成环境污染。
Said method features simple process, low cost, saving raw material, without environmental pollution, high recovery rate and good purity.
本方法工艺简便，成本低，节省原材料，无环境污染，回收率高，纯度好。
Using plastics to make automotive parts is the main method to achieve the developing direction to lighten the weight of automotive parts without environmental pollution.
用塑料制造汽车零部件是实现当前世界汽车材料的轻量化和环保化发展方向的主要手段。
Using plastics to make automotive parts is the main method to achieve the developing direction to lighten the weight of automotive parts without environmental pollution.
用塑料制造汽车零部件是实现当前世界汽车材料的轻量化和环保化发展方向的主要手段。
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