The world is not only hungry,but also thirsty for water. This may seem strange to you, since nearly 75 % of the earth's surface is covered with water. But about 97% of this huge amount is sea water, or salt water. Man can only drink and us...

The importance of water 水的重要性 Of all the things we eat and drink, water is the most important. We can live without food for many days, but two or three days without water, usually makes people die. 所有的事情我们吃的和喝的,水是最重要...

Water is very important to us. If you don't have water for three days, you will die. We can use water for flowers, swimming, washing and many different things. We use it to cook, make electricity, and put out fires and so on. We use millio...