This is what big business want. Did you have a look at what the media think about electric cars? They always show either Tesla or big electric SUV and they tell you that they are green. Big business want to sell big cars even if they require a lot more energy and materials to be manufactured, even if they consume a lot more energy when they are on the road, even if they take a lot more space on the road and in the parking lots.

The only chance we have that I see is the rapid development of fusion into a proper, usable power source,

Fusion is a marketing story to distract the attention. It is so difficult to realize a practical commercial fusion technology that it will not be available this century for sure.

In any case as I explained in the other comment the root cause is overpopulation. Solving the energy problems might mitigate for a while the situation, but it will not solve the situation. Famines, conflicts and mass migration will happen anyway.

famines, conflicts and mass migration

This will happen for sure and the cause is not just climate change. The cause is overpopulation and exhaustion of the Earth resources.