@glaroc @clacke @pezmico Organic solar PV isn't that hard and is coming along nicely. (To the point where it would already do fine, just not as cheaply as the current (really effective!) inorganic solar PV.
Nothing is harmless; nothing is clean. An ecosystem turns shit into food; organisms turn food into shit. The trick with an industrial culture is to set it up as a closed-loop ecosystem. (Vehemently opposed on grounds of incumbent wealth not liking accurate costs.)