It is difficult but not impossible to plumb not using PVC pipe. The thing to remember is that the inside of all the pipework is very quickly coated with bio film which gives a good barrier between the water and the PVC pipe.
The move to a better chemical free life is to do the best one can at all times. I think we can do a lot to reduce the use of suspect materials.
Further, it is easy to "major in minors" if we are not careful. Some folk get all carried away about the use of a few mtrs of PVC pipe while still commuting to the city and back stuck in traffic breathing in all those fumes. One days commute would most likely equate to a couple of decades of PVC use in an AP system.....
Not trying to be flippant about this, but do the best we can with what we have. New and better materials will be found as we all keep looking.
Did you intend to post the same post in two places ? I will delete the other or this one ?????