Batteries contain heavy metals such as lead, cadmium and mercury that can be harmful if they leak into water supplies or eventually produce noxious gases which enter the atmosphere.
含有的铅、镉、汞等重金属的电池一旦泄漏进入水源或产生有害气体进入大气，将对环境产生危害。
Divergent elements of the rocks reflect different colors, what's worse, these rocks are noxious and harmful to people who touch them frequently.
这些色彩是由矿物质中那些不同元素所组成，而且岩石含有毒性，接触多了对人的健康有害。
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