It is the consumptive imperative growth-paradigm of contemporary capitalism as it operates in practice in most of the world today, and from which stems excessive energy demand, that is the overarching problem to be solved.
As an anarcho-environmental-socialist, if you will, I would not necessarily dismiss the use of nuclear fission or fusion electrical energy generation, whatever the degree of central- or decentralisation (mini-generators could be of interest), as part of a system of intelligently-designed, regulated and operated economies.
My point is that everything depends on this re-design and succesful implementation of new kinds of society.
But you say you do not care, ...
I don't care what social system builds nuclear power plants, so long as they are built
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... apparantly assuming a priori that business-as-usual must persist, ...
My advocacy of nuclear power is about the crisis in climate change on a world that now holds six and one half billion people, many of whom who have no access to decent living conditions.
... in societies which provide for far from decent living conditions for too many.
Where you mention a preference for integrated public trsnsport systems, however, you do imply some social change.
Greetings.