How much energy could be generated if was possible to collect all the farts form USA people ?
Another energy source it's wasted everyday in every home, in the toiled. Yes, poop could became fuel for cars
Brazil had a university project to a biodisel from suage, or something like that. USA had one from wasted fat from restaurants, to became fuel for jets.
Poop should never go into the rivers. It should be collected to became fuel and/or fertilizer.
And even tires and plastic could became fuel :
But thermaldepolymerization process have some cost to anoy.
Pressure and heat, like nature creates oil, but in a speed-up fashion.