We’ve all heard the reasons why a vegan diet is better for the environment, but what about when it comes to fashion? Animal-sourced materials such as leather, wool, and silk have long been a mainstay of the luxury fashion industry, but rising sustainability and ethical concerns have led to the rise in popularity of vegan fashion in recent years. But is vegan fashion really better for the planet? When comparing animal-based ingredients to vegan alternatives, the answer is usually yes, even when looking at greenhouse gas emissions alone. Ashley Gill, senior director at the nonprofit Textile Exchange, told Vogue, “Current…