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And don't forget ethanol, probably the least efficient form of energy ever discovered

What are you talking about, it powers a lot of people I know

Does it do it efficiently though?

It saves energy by making them feel warmer in the winter. If they overdo it and freeze to death, it saves even more energy.

It's an anti-freeze. Ask the people that survived the Titanic in the water :)

And is a horrible use of land compared to solar.