Instead of giving your unwanted clothes to charity in the future, you could be able to use them to fuel your car. A pair of jeans will allow you to drive about 5 km. No, this isn’t a joke, it’s what Swedish researchers have discovered, a way of extracting a good and cheap bio-fuel from old rags. Researchers at the Swedish School of Textiles in Borås see a deposit system as one possible trend for the future, instead of throwing out your old clothes you will receive a small amount of money when you hand them in for recycling. All composites are separated – the researchers only want the cotton – and up until now it has been possible to separate this from polyester. The cotton becomes biogas or ethanol and the polyester is re-used in textile production. An amazing approach towards sustainable development!