> Are you suggesting that the furnace that heats your home is fueled by burning deceased people?

The furnace that heats his home is more likely fueled by natural gas, however the combustion chamber where that gas is being burned may also be used for cremations.

I'm pretty sure that humans make pretty lousy fuel.

“I shall not speak of the railway, for it is like any other railway—I shall only say that the fuel they use for the locomotive is composed of mummies three thousand years old, purchased by the ton or by the graveyard for that purpose, and that sometimes one hears the profane engineer call out pettishly, "D--n these plebeians, they don't burn worth a cent—pass out a King …”

twain

>I'm pretty sure that humans make pretty lousy fuel.

Aside from moral/cultural qualms and a difficulty achieving scales of efficiency, there's no reason human remains couldn't be used to produce perfectly usable biodiesel.

In spite of that we make quite decent flamewars in the social media.

We're good mental fuel and I wonder sometimes if there is any liveform in the universe that feeds on that (god ;p).

No, but the waste heat could be used. See https://en.wikipedia.org/wiki/District_heating#Sweden for more info.

Not like they are pumping around the ashes. It's worse to think about than it really is. It's just heat. Every now and then you think about where the water you're drinking have been in the past too, right?

https://news.vattenfall.com/en/article/immortal-heat