Industrial waste is even more harmful since there are many highly poisonous materials in it, such as copper and lead.

工业废料更有害，因为其中有许多毒性很强的材料，如铜和铅。

youdao

Many of these "informal" industries take few precautions to protect workers from hazardous materials like lead and mercury in the waste.

这些“非正规”工业几乎不采取预防措施保护工人，防止垃圾中如铅和汞之类的有害物质。

youdao

And the idea of transformation optics is so beautiful that it would seem a profligate waste of inspiration if it didn't lead to something useful.

变换光学的想法非常美妙，因此如果没能促生一些美好的事物，似乎就是对这一灵感的挥霍浪费。

youdao

And lead amounts can be especially high near industrial areas and waste dumps.

VOA: special.2009.06.09

This can lead easily to waste and duplication.

ECONOMIST: Human intelligence

"Weekly bin collections are more expensive to run and lead to less waste being recycled, which is bad news for cash-strapped councils and families and bad news for the environment, " said its waste campaigner, Julian Kirby.

BBC: Weekly bin collections 'still due for return'

While the Environmental Protection Agency would prefer to regulate the byproduct that contains arsenic, mercury and lead under stricter federal hazardous waste laws, the utility sector wants it to remain classified as a solid waste that the states now oversee.

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