You mean the swirling bowl thing.
Why do people not understand where we are ?
Here is a handy diagram I drew up:
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We are in the "glug" zone of a toilet.
If you aren't an old guy, you may have never flushed a proper water wasting toilet.
They gave a satisfying "glugglugglug" thus letting you know the turd was safely on its way and in the pipe.
I'm sorry to say, as my illustrating indicates, we are actually on the second glue. Nothing left but a bubbling rot.
Now its true. We could end up in a "reclamation" where the bad stuff is subjected to an environment quite inhospitable to shit. Eventually, through rigorous biologic process, it could be pure again.