The many ways in which we use water for drinking, washing in, cooking etc; vast amounts of water are also used in farming (it takes about 500 liters of water to produce one orange), industry, leisure and so on; Taking Action: keep a water diary to see how much water you use in 24 hours and what you use it for; why wasting water is a problem for the environment (danger of drought, water shortages); Science Behind It: why your body needs water to function