For decades, humble denim jeans have been at the heart of our wardrobes. Durable, comfortable, and always in fashion, denim is an evergreen fabric. But, unbeknownst to many, the vibrant hues of blue or indigo come at a high environmental cost. Traditional dyeing processes, which give denim its characteristic color, rely on methods that are not only antiquated but starkly unsustainable. But there may be a better way to do things — and a new study describes how. The dark side of denimDenim dyeing is a $80 billion industry and it’s not a very sustainable one. Conventional dyeing relies heavily on…