Society’s craving for fast fashion has an adverse impact on people and the planet, but the world’s largest apparel companies say they are working to solve the problem. One such firm is Inditex, which owns the popular chain Zara. The Spanish retailer launched a new fashion line, Join Life, for autumn. It says the collection “embraces a woman who looks into a more sustainable future.” Zara describes the androgynous, mineral- and earth-toned collection of denim, masculine-cut coats and frilled…