Power should be generated on a hub and spoke model. Wind/Solar/Geothermal/Nuclear (Molten Salt)/Fission/whatever else all contribute portions to the hub, and when one fails the others step up. And Coal / Petroleum are still spokes, but the percentage of contributions should be narrowing - and they have.
The ability to store power will be our best course of technological development; if we can somehow find ways to store huge amounts of power for long amounts of time, generated by eco-friendly sources, we will enter a new age of human development.
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