eli5 why does manure make good fertiliser if excrement is meant to be the bad parts and chemicals that the body cant use
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Well, there’s a couple things to keep in mind
1) Everything is a chemical; Nothing is inherently bad to everything… Well, mostly. But not much.
2) It’s stuff that ***your body in particular*** can’t use ***in the here and now.***
3) Digestion transforms what’s taken in
Your carrot isn’t made of fertilizer. The carrot took that fertilizer when it was alive, broke down the chemicals inside of it into simpler pieces, and used them for different things.
Animal poop (yours, the dogs, a cows, etc) is basically a mix of dead cells, stuff you couldn’t digest yourself, etc. **You** poop it out because you can’t use that.
The bacteria and fungi in the environment (as well as the bacteria in your poop) **can** eat that stuff, so they eat it, and then poop out simpler building blocks; things like phosphorus, nitrogen, potassium.
The plants then eat those things, break them down, and use them. Plant ‘poop’ is mostly just oxygen. And then we breath that in, use it, poop out the left overs, yadda yadda yadda, the cycle repeats.
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