Key context: thermodynamics dictates that heat engines waste a lot of energy.

Credit: Karin Kirk

A pickup truck belching a big cloud of black exhaust. Inside the cloud in white text: Wait, 80% of my gas money goes out the tailpipe? How come Exxon never told me that?
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[–] 1 point 2 years ago

When people realize that heat is actually energy and not just some free byproduct :o

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