That is not really a solution in itself though. As soon as it becomes cheaper, fossil fuel prices will drop due to a drop in demand for them, especially in developing countries. Moreover, more clean energy might mitigate the CO2 problem somewhat but it does not necessarily mitigate our expansion into natural habitats, an expansion that destroys them.
It is simple-minded to think that a single technological breakthrough will suddenly make the problem of climate change go away.
A cheaper alternative energy would reduce usage of fossil fuels even if they became cheaper.
I agree that a single technological breakthrough is unlikely to solve climate change. It will require many. I am simply pointing out that it is incorrect to say that the only solution is a global cartel to make fossil fuels much more expensive.
80 years ago vast swaths of the world sent a generation of their young people off to Europe and Asia to die for the sake of political alliances. Killing all those people was extremely expensive.
It is simple-minded to think that a single technological breakthrough will suddenly make the problem of climate change go away.