怎样处理外来入侵的有害物种？
一种选择方案是根据联邦《莱西法》把它们列入有害物种名录，这样使巨蟒进口或跨州运送变得非法。
One option would be to place them on a list of injurious species under the federal Lacey Act, which would make it illegal to import the snakes or carry them across state lines.
电子废弃物种类繁多、成分复杂，含有多种有毒、有害物质，已成为固体废物中最大的重金属污染源。
Electronic waste contains different kinds, components and poisonous substances; it has become the largest pollution source of heavy metal in the solid waste.
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