I knew about DLs edibility (is this correct?) but I won't eat them. Apart from what I know I give to my plants I strongly doubt about air and soil. We're in a infamous area, too many pollution everywhere. There is Chromium 6 in some water well (still we don't know what the truth is, where it is and really how much it is), nuclear waste... and many others dangerous polluting things here and there. That's one of the reasons because of I want to move far from this place!