Imagine if every item we bought created virtually no new pollution. That is what you get when you buy used goods. Now, of course, it takes a buyer and seller to make it happen. Do you have unused stuff lying around that needs a new home? Perhaps it is time to join the fun of a circular economy.
By selling things second-hand, you give people more options to shop sustainably. It saves energy and resources (often polluting) of that item being created from scratch. Not to mention, you replace an unused object with cash and free up space in your place! Give it a try and see how it goes.