At this point I still have my doubts regarding the extent in whiich global warming is caused by man ( 30%-70% ? who knows.)
But I can't agree with your statement. If you put solar panels in your roof and a solar heater you become less dependent on the government and the big corporations which may feel tempted to increase the price of electricity arbitrarily.
The same happens if you get a diesel or a hybrid car, you become less dependent on oil companies an the tax asociated with gasoline.
How can such a measure be about "control of the people"?
Of course, solar is not an option for everyone. Someone living in Seatle might find a hard time harvesting energy from the sun , but someone living in the southwest will surely recover the investment quickly enough.
We already have enough "control of the people" with the American government storing every email and social network profile for their own purposes. I certainly don't think a little bit of alternative energy production can make things worse.