simple solution; make the polluters pay for their pollution

https://www.csmonitor.com/Environment/2017/0919/UN-solution-for-a-pollution-free-planet-polluters-should-pick-up-the-bill

"Highlighting the dramatic progress made by China and India, Erik Solheim, executive director of UN Environment, urged governments to take a joined-up approach to going green.
'The profit of destroying nature or polluting the planet is nearly always privatized, while the costs of polluting the planet or the cost of destroying ecosystems is nearly always socialized,' he told an international conference on sustainable development at New York's Columbia University on Monday.
'That cannot continue,' he said. 'Anyone who pollutes, anyone who destroys nature must pay the cost for that destruction or that pollution.'”

Makes perfect sense to me.  The Commons must be protected for all.