饮用水被铅污染了。
这就意味着这些被药物污染的废水会进入地表水和地下水，而这正是大部分人饮用水的水源。
That means the drug-tainted wastewater can enter groundwater and surface water, which are collectively the major sources of drinking water for most people.
黄河，也就是所谓的中华文明的发源地，被污染的已经无法提供饮用水。
The Yellow River, the so-called birthplace of Chinese civilization, is so polluted it can no longer supply drinking water.
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