Science STD 7 ch 16 water; an invaluable source

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.                                            water is a very valuable source for everybody on this earth ........

water is useful for drinking, bathing , cooking, industries.... and everywhere we can not live more time without water.. today water for drinking is very  costly because we can not use the sea water and we cant make sea water drinkable.........













                                          water is not just a water the main important thing is pure water...... we must drink a pure water...... in every day routine life some times we throw water which is unused we should try to consume the water... harvesting and water fill are important.... source of water are dams wells and rivers............ save water save life..................