Re: Guzzling?
it's only in the US where renewable energy sources haven't been developed.
in the UK, there have been times this year when renewables have been producing so much power that the price of electricity has become NEGATIVE. That means you could have been paid to use electricity.
And there have been more times when renewables have produced all the electricity the UK was using at the time, with no need for any fossil fuels to be burned.
If that doesn't prove that renewables can provide for a non-trivial amount of a nation's needs, I don't know what can.