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It is commonly believed that without high energy machines billions would starve.
This is ridiculous. Six billion of them are growing their own gasoline and harvesting it with a scythe.
Our system is a giant circular machine that produces untold millions of calories of corn and soybeans, runs half of it through cows and hogs, half of what's left through cars and trucks as biofuels, where there are more fossil calories in it than come back out.
We call this "efficiency."