A Why do we need to drink water?
We all know that our bodies need water. Water cleans our body, controls our temperature, and helps to keep us healthy. About 70% of our body is water.
B How much water do we need to drink a day?
We often read that we need to drink at least eight glasses of water a day (about two litres). The idea probably came from mineral water companies! In fact, how much water we need depends on the weather and on what we're doing. When we are hot, of if we do sport or exercise, we need to drink more. Some experts say that, in normal conditions, we only really need about on litre a day.
