[填空题]Remember the drinking f0untain,that once ubiquitous,and free,source of H₂O It seems quaint now. Instead, bottled water is everywhere. It’s refreshing, calorie-free, convenient to carry around, tastier than some tap water and a lot healthier than sugary sodas. But more and more, people are questioning whether the water, and the package it comes .in, is safe, or at least safer than tap water and if the convenience is worth the environmental impact.
Evocative names and labels depicting pastoral scenes have convinced people that the liquid is the purest drink around. Yes,some bottled water comes from sparkling springs and other pristine (清新洁净) sources. But more than 25 percent of it comes from a municipal supply. The water is treated, purified and sold to us, often at a thousand-fold increase in price. Most people are surprised to learn that they’re drinking glorified tap water, but bottlers aren’t required to list the source on the label.
The controversy isn’t s

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