The only renewable energy source are trees. You cut one down for fuel, you plant two more. Now if we could capture the methane from cow farts that might be a renewable fuel source. Cow eats grass, farts, cow eats more grass, farts again.
Could we collect the farts and hot air from liberals?
The liberals would have to be imprisoned to allow collection of this new green source of energy. If I contact AOC, she will most likely want to imprison conservatives instead. But conservatives have significantly less hot air compared to liberals which significantly reduce the amount of energy gained! /sarc