Pooing in a bucket and then burying it next to a tree is alien to most to but I will be doing exactly that today.

Yes most people have limited options and are trapped into dependency upon food supply chains that are full of toxic sludge but everyone can take steps to reduce that dependency.

If you have access to some land start buy burying food scraps in it and planting food on top. Within a few weeks worm colonies will be following those food scraps and making richer soil.