The only problem is it takes 100s of thousands of years for the dead homeless/poor people to breakdown into fossil fuel.
It wouldnt really help us.
If we could somehow speed up the process or make cars/factories that ran on homeless people slurry* we could benefit immediately
*slurry(sler-ee) a liquefied
meat product that contains fewer fats, pigments and less
myoglobin than unprocessed dark meats. Meat slurry also eases the process of meat distribution and is more malleable than dark meats