Here I want to tell you some informationabout water.

    Water covers most of our planet. People canfind it in oceans, lakes and rivers, and under the ground. Water moves in theenvironment by evaporation, condensation, and precipitation. The warm Sun helpswater change into vapour and rise up into the sky. It is evaporation. Thevapour in the air forms clouds in the sky. It is condensation. When the cloudsget heavy enough, the water falls back to the ground as rain or snow. This isprecipitation.

    Ocean water has too much salt in it. Muchof the water travels far over the land. When it travels over the land, thewater picks up salt from the rocks and soil. About 97.5% of the Earth's wateris salty water. It is expensive to take salt out of the water.

    All people need clean water. They need itfor drinking, for cooking, and for bathing. Some people in a village in SouthAmerica did not have clean water. Their water was full of oil and dirty things.People there got sick when they drank the water. Other people heard about theproblem. They sent empty water tanks (储水池) tothe village. Rainwater fell into the tanks. Now the people in that village havethe clean water.