收集废电池
Collect waste batteries
暑假里,学校布置了一项作业——收集废电池。我不明白为什么废电池不能像一般的垃圾一样扔掉而是要单独收集呢?妈妈给我看了一篇文章我才知道:原来废电池中有汞、铅、镉、铬等有毒的重金属,跟生活垃圾混在一起的话,那些有毒物质就会慢慢地从电池中溢出来,污染土壤和地下水源,最后通过农作物进入人体,对人体造成危害,甚至致癌!还有一组数据:一粒纽扣电池可以污染60万公升水,相当于一个人一生的饮水量!一个一号电池可以让一平方米土壤的庄稼绝收!哇,太可怕了!
During the summer vacation, the school assigned an assignment to collect waste batteries. I don't understand why waste batteries can't be thrown away like garbage, but collected separately? My mother showed me an article that I knew: there were toxic heavy metals such as mercury, lead, cadmium and chromium in the waste batteries. If they were mixed with domestic garbage, those toxic substances would slowly spill out of the batteries, polluting the soil and groundwater, and finally enter the human body through crops, causing harm to the human body and even cancer! There is also a set of data: a button battery can pollute 600000 liters of water, equivalent to a person's lifetime drinking water! A No. 1 battery can make crops of one square meter soil harvest! Wow, it's terrible!
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