That doesn’t make much sense. Every atom of calcium in a chicken bone came from a field somewhere that now has to be augmented with more calcium. The easiest way to supply that calcium is to grind up the chicken bones and sprinkle them on the fields - if you go to a garden center you’ll find tons of products that list “bonemeal” as an ingredient. Since chickens require 3-5x their biomass in food and calcium in their meat is digested, there will never be enough bones to replenish the calcium used to feed them.
I find it hard to believe that the meat industry throws their bones away instead of selling them back to the fertilizer manufacturers that supply their feed vendors. Only chicken bones thrown in the landfill by consumers are lost and these are hardly a problem compared to the volume of other crap we discard.
Depends on the landfill, I guess? I would imagine that most modern landfills are lined with heavy duty plastic sheets to prevent all the toxic crap from leaching into the groundwater. What happens to that stuff? I guess some of it will biodegrade over a long period of time, and I'm sure all kinds of animals will attempt to feed on it, but the vast majority of the bulk is no longer part of the ecosystem. For better or for worse.
In my part of the world we incinerate most of our waste and turn some of the waste heat into electricity. I wonder what happens to the organic matter in that scenario. Most of it probably ends up as toxic ash which is pretty useless?
I think mining landfills is a cool idea in theory, but I've never heard of anyone doing it (the closest is processing old mining slag for more materials).
I find it hard to believe that the meat industry throws their bones away instead of selling them back to the fertilizer manufacturers that supply their feed vendors. Only chicken bones thrown in the landfill by consumers are lost and these are hardly a problem compared to the volume of other crap we discard.