两年之内，这些手机中的大部分都将被废弃，成为塑料、重金属和化学垃圾。
Most of them will be thrown away within two years, adding plastic, heavy metal and chemical waste to the environment.
一些形式的污染仅仅是看起来糟糕，更有些其他形式的像化学垃圾等的污染会导致死亡。
Some forms of pollution just look bad, while other forms like some chemical wastes may cause death.
这种化学污染有两个来源：直接把污水倒进河里的工厂，和把未经处理的人类垃圾倒进河里的本地社区。
This chemical pollution has two sources: the factories which dump polluted water directly into the river and the local community which dumps untreated human wastes into the river.
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