This is very obviously not correct, though it's funny. The amount of energy, CO2 and waste expended to produce a human skull is astronomical compared to a plastic cup
But that depends, if you are doing a human skull farm than of course it is. If your enemy would have lived to 80+ years otherwise this is 100℅ more environmental friendly. Also the skulls reusable I guess.
You could destroy the planet less by reducing their lifespan, only letting females live since the boys tend to eat more due to their hormones and stuff, and utilize every part rather than just the skulls!
Edit: would it be less? Idk this stuffs hard to quantify.
