PreciousWater珍贵的水资源.ppt

Precious Water,Where there is water,there is life.,Water is one of the indispensable conditions for human survival.No water,no creatures!,It is water that makes our life possible,However,In 100 BC,water can drink without purification.,In 1960s,water needed purification before drinking.,In 1990s,water required morepurification,Years later,water will be,Water Pollution,The great shortage of water,So,Lets do it!,POLICY,Plant more trees,Protect the forests and all the animals,Restrict the use of sustainable economic,THANK YOU,