I'm not saying it's what you are implying, not trying to pull a strawman here. But I disagree with the notion that healthy competition is the successful, stable outcome capitalism has been producing on its own. Works fine in economics books (of which I read my fair share). But in practice, the dynamic is towards concentration of power and resources at the expense of the outside world — not to its benefit. The Emmanuel Faber case at Danone partly illustrates my point: https://en.wikipedia.org/wiki/Emmanuel_Faber

Everything is being tried with smaller or bigger success.

IMO capitalism and state interventions are the most successful.

EU Emissions Trading Scheme is probably one of the best methods.

Cap emissions according to the climate goal and trade the resulting emission allowances.