Did you know that it takes about 11,000 litres of water (about 78 full bathtubs) to make one single pair of jeans?
Denim is made from the fibres of cotton plants, which are grown on large plantations in warm countries.
The fibres are extracted and twisted into long threads and then weaved into fabric.
The fabric is cut and sewn into pairs of jeans.
Old jeans often end up in landfill sites, along with millions of tonnes of other clothes and textiles.