Showers use around ten litres a minute, so a four-minute shower instead of eight saves forty litres. A water-saving shower head halves that again. A dripping tap can waste more than five thousand litres a year. Replacing a worn washer or cartridge usually takes ten minutes. Run the dishwasher and washing machine only when they are full, and water the lawn in the evening, when less evaporates. Collect rainwater in a butt for the garden.
