What do I do when I question the environmental cost of my industry?

You are skilled at your work, and part of you keeps circling back to what your industry costs the planet. You do not know where to put that feeling, so it just sits there, uneasy. That unease is not something to shove down. It is your conscience doing its job, and a conscience worth having does not go quiet just because the questions are hard. You do not have to choose between quitting in protest and pretending you do not care. Between those extremes is a lot of room. You can be the person inside the industry who pushes for cleaner methods, less waste, better choices. Change often comes from people who stayed and knew the work well enough to improve it. Your skill can be part of the solution, not only the problem. Sit honestly with what you can and cannot influence from where you stand. Do what is in your reach, and do not crush yourself with guilt for the whole system's weight. One step: pick one thing at work you could push to be a little less wasteful or cleaner, and start that conversation. Small, real actions settle an uneasy conscience better than either denial or despair.