Jeans are the most popular trousers in the world. Every year, over 2 billion pairs are made. But most travel one and a half times around the planet before reaching your wardrobe. With toxic dyes, chemical pollution and massive water waste, denim’s carbon footprint is anything but small. But change is happening. From cutting-edge tech to natural dyes, ancient weaving to local production, innovators are rethinking jeans for a more sustainable future. The Down to Earth team takes a closer look.