For example Roots organic has been known to use building scraps in their compost pile. Do they use sewage compost? Does your soil contain sewage compost? Sewage compost is THE HOT substrate right now for potting soil companies. They give you a bag OF hopefully fully composted HUMAN SHIT from the treatment ponds and these people think all super soil is the same. I'm not trying to be mean but you guys better study the fuck up before you spout off some rumors on super soil now because I have and I will call you out.
If you want a REAL QUALITY potting soil that is THE SAME thing every time you buy check out DR EARTH. He uses REAL compost and it makes ALL the difference in the world.
shmoop there is a lot more to all this than most people know about.
If you want real quality, go outside and build your own goddamn compost pile, and build your own leaf mold bin to replace peat AND coco.
Sure coco is alright, but don't go thinking it dosent have its own ecological issues and karma associated with it (like clear cutting the rainforest in order to plant coco trees...)
The best thing anyone of us can do for the earth, our plants and our self's is to start making our own mediums, plant extracts and teas. Its only makes sense, save money, go ORGANIC for real, and have some of the tastiest herbs on this good green earth. Grow your own, shouldn't end with smoke, it means food, medicine and fertilizer. End of rant.