Reminded by this thread Things that can’t go in the garbage disposal, I’m posting something I’ve wondered about. (Here in GQ, hoping somebody can give a real answer. But maybe it belongs in IMHO.)
Trying to be conscious of environmental concerns for our planet, which is a better way to dispose of kitchen waste: an in-sink garbage disposal or a kitchen trash can?
From the garbage disposal, they are chopped up and go down the pipe, eventually to the sewage treatment plant. That treats the water and then sends it down the Mississippi to Iowa, etc., while the ‘solids’ are removed via settling ponds and then either incinerated (generating electricity) or ‘pasteurized’ via a heat/lime dust process and then used as fertilizer on farm fields. A fair amount of clean water is used up in this process, since you are supposed to leave the water running while grinding things up in the garbage disposal. And a small amount of electricity to run the motor. But I don’t think there is much oil-based transit involved, since this is transported via the sewage system, mostly running downhill without too much pumping.
Throwing them away in the kitchen trash can means that they are gathered into plastic trash bags and put in the garbage bin. Then each week a garbage truck comes down the alley and picks them up. They are trucked to a centrally-located incinerator that burns the garbage and produces energy & heat for downtown buildings. The ash remaining after the garbage is burned is buried in watertight landfills.
(Composting might be an alternative, but I don’t have a compost heap, I probably wouldn’t generate enough waste to keep one going, and I understand that food waste, especially cooked food, should not be put into compost heaps anyway. So that option isn’t very feasible for me.)
So which of these is better, environmentally?
And, please, I’d prefer answers based on evidence & cites rather than opinion, if possible.