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We get more useful energy out of renewables than fossil fuels
It costs less energy to get fossil fuels, but we can't use them as efficiently.
A new study by researchers at the UK's University of Leeds, however, suggests that this isn't a concern at all—in most countries, renewables already produce more net energy than the fossil fuels they're displacing. The basic idea behind the new work is that while it's energetically cheap to extract fossil fuels, the stuff that comes out of the ground isn't ready to be put to use. Natural gas has the highest useful-stage EROI at 9.5, coal is at 7.2, and oil products are only 2, meaning we only get about twice as much energy out of gasoline as we put into producing and using it.
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