harmful element in coal

例句：

1. 1. The coal mine is contaminatedwith harmful elements that can cause health problems.
   煤矿被有害元素污染，可能导致健康问题。
2. 2. The chemicalindustry produces many harmful elements thatare harmful to the environment.
   化学工业产生许多对环境有害的有害物质。
3. 3. Thecompany has been accused of using harmful elementsin their products, which could be harmfulto consumers.
   该公司被指控在其产品中使用有害物质，可能对消费者有害。