"Bitumen is junk energy. A joule, or unit……" — Thomas Homer-Dixon

Bitumen is junk energy. A joule, or unit of energy, invested in… - Thomas Homer-Dixon
"Bitumen is junk energy. A joule, or unit of energy, invested in extracting and processing bitumen returns only four to six joules in the form of crude oil. In contrast, conventional oil production in North America returns about 15 joules. Because almost all of the input energy in tar sands production comes from fossil fuels, the process generates significantly more carbon dioxide than conventional oil production."

Thomas Homer-Dixon

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