The new dual-flush toilets
One day, huge toilet tanks will be a thing of the past. Just think: Toilets older than 15 years use 18 or more litres of water per flush. Newer-generation toilets typically use 13 litres, and still newer versions use just six. But the latest and most eco-friendly are the dual-flush models. Long in use in Europe and other parts of the world, these let you choose between two water flows-three or six litres, depending on what you’re flushing-and will conserve more than 190 litres of water a day for a family of four. Here are three choices.