Although water is the most common substance on earth ,we should use it carefully because only 1% is drinkable and 1/3 of all the people in the world can't get enough clean water .
Today , we use 3 times more water than in 1950,and people in rich country use 10 times more than those poor ones,so where does it all go? Well, a single dripping rap can waste about 260 itres in a day .at home, we can help by fixing broken taps and toilets.Having showers instead of baths could save about 300 itres of water a week . we should also avoid using chemicals that pullute the water supply, because we can't increase the amount of fresh water in the world . we can only change the way we use it