Globally, a staggering 4.5 billion pairs of jeans are sold every year. But producing denim using current techniques causes enormous environmental and social harm, often in developing countries. At the same time, here in the UK alone, a colossal 300,000 tonnes of clothing are discarded and end up in landfill every year. In this challenge, you will help tackle these problems, by taking an old pair of jeans that’s no longer worn, and transforming it into something new. To help inspire you, there’s video content from Siobhan McKenna, founder of sustainable fashion brand ReJean denim, and some video tutorials from current students at London College of Fashion. If you don’t have much experience of sewing, we’ve also included links to some tutorials to get you started.