Water

Water [0] is absolutely essential (1) life on Earth. Human beings can survive for weeks without food, but only a (2) days without water. It regulates our body temperature and helps to transport nutrients. (3) the fact that about 71% of the Earth’s surface is covered in water, only a tiny fraction of (4) is fresh and safe to drink. In many parts of the world, access to clean water is a major problem. We all have a responsibility to avoid wasting water (5) that there is enough for everyone. Turning (6) the tap while brushing your teeth is (7) simple way to help.