In decades past, as the effects of climate change slowly became undeniable, some looked to the super-rich — the billionaires with enough cash to really make a splash — for solutions.

It’s a go-to chant for Planet Over Profit, the climate justice group I organize ... He seemed like a billionaire who truly cared, who was going to lead us into a green future.

Australian tech billionaire and climate activist Mike ... renewable energy and funding philanthropic efforts to combat climate change. One of his companies, Sun Cable, is building the A$30-billion ...