Talk about the imprtance of water(谈论水的重要性)

   Water is the most important to all living things.All plants and animals need water.Most plants need lots of water .Water i s necessary for all plants.All animals need much water .They can't  live at all without water.Humans need water to drink ,to cook ,to clean.In fact water makes up the greatest part of the human body.Without water,there can be no life on earth.So we must save every drop of water.