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Your challenge - if you accept - is that in 2012 there is at last one major industrial-level space-based solar power satellite (http://en.wikipedia.org/wiki/Space_Solar_Power) connected to the world's electric grid.
You can use any PODs between 1900 and 1975 to make it so (Minor Dieselpunk Tech development is allowed). No ASB allowed.
Bonus if at 2012 there is more than one sattelite
Maximum bonus if Space Solar Power is a major contributor to the world's power grid at 2012.