translation from english into chinese.
It is said that although water is essential for life,it costs nothing.On the other hand,diamonds cost a lot,yet they they are essential for nothing.The world has changed greatly since an 18th century economist made the remark.
What was true over 200 years ago is certainly no longer true now.In many countries,people pay as much for water in their homes as they do for electricity.
We neglet water when we have plenty---unless there are floods,of course.Once there is a threat to our water supply,however,water can quickly become the only thing that matters.We know only too well that without water,there can be no life.
The situation is now becoming so bad that scientists feel it may be necessary to shock the world into saving water the way oil crises caused people to save energy resurces in the 1970's.