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Solar furnaces help obtain clean materials without any contaminants .

太阳炉能帮人获得没有污染物的洁净材料。

Researchers have now linked several environmental contaminants to effects on developing brains .

近期的研究联系了环境污染物发育期大脑的影响。

Studies suggest that fish oil products contain little or no contaminants .

研究表明，鱼油产品含有很少或根本没有污染物。

Both fresh wild and canned salmon are also low in contaminants such as mercury and pcbs .

新鲜野生鲑鱼和罐头鲑鱼污染物含量比如汞和多氯联苯都很低。

See green guide # 101 for contaminants to avoid and best filters .

详情请见绿指南＃101中的污染物以及可供选择的过滤器。