That's too broad. We can have almost any system, as long as the incentives are aligned correctly. We don't make companies pay for externalities, and we should.

That's too broad. We can have almost any system, as long as the incentives are aligned correctly. We don't make companies pay for externalities, and we should. Maybe we could tax companies that sell plastic packaged things to pay for recovery costs, or make them recover it themselves. There's lots of options and many of them could exist in a world where private interests make profit. We just can't let profit be the goal, it has to be the reward for acting responsibly.