Green Left makes clear the obvious point that capitalism, with its maniacal focus on short-term profit over everything else, is incompatible with the long-term vision and planning needed to stop global warming.
But then they quote Bolivian president Evo Morales saying “The real cause of climate change is the capitalist system. If we want to save the Earth then we must end that economic model,” which strongly implies that socialism is a better route.
Well, maybe. But USSR under communism despoiled and plundered land and resources at least as much as the US. China, which is a weird capitalist-socialist hybrid, isn’t exactly turning in stellar results either, as they build ever more coal plants. Sure, Cuba has indeed made a transition to a more renewable type of economy, but that was forced by events external to them (the collapse of USSR.)
So maybe that’s what it will take. The changes come when events force them.