Replying to Skis are bad for the environment?

So i was in one of my business lectures the other day, and the teacher was talking about business ethics and the responsibilities of product managers. She said, "Product managers have to be thinking about consumers in many more ways than just how to please them. The environmental issues that society is aware of today are partly their responsibility. So it raises the question of whether we should even produce environmentally harmful goods like skis..." and i was like hold on, skis are bad for the environment? Well shit, can anyone elaborate on this?