You're replying to a comment that proposes a market-based solution. Shipping has externalities. Those externalities should be included in the cost of shipping. Then the market will make the right decision.
The economic concept implies that we're going to have an evidence-based discussion about how we're tracking specific dollar cost amounts of pollution or something, and then in practice that essentially never happens and it's just "I've decided you don't really need that thing you want"
How do you see it differently?
This is much closer to a sin tax.