THREE KEY FACTS: Nearly 80% of our clothing’s environmental footprint arises from washing and drying. Each load of washing uses around 85 litres of water, according to the No Wash Club. By doing one less load a week, people can save up to 4,420 litres per year.

Maggie Alderson is a British author, magazine editor and journalist who writes for the Daily Telegraph. OPINION Are you washing too much , too little or just often enough?.