无汞和铅污染。
汤普森的严格的质量控制程序测试所有原材料，以确保没有化学污染物，如多氯联苯，汞和铅。
Thompson's rigorous quality control procedures test all raw materials to ensure no chemical pollutants such as PCBs, mercury and lead.
焚烧重金属或金属含量高的材料(尤其是铅、汞和镉)可能使有毒金属传播到环境中。
Incineration of heavy metals or materials with high metal content (in particular lead, mercury and cadmium) can lead to the spread of toxic metals in the environment.
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