Whi.h b.ri 1 d rng materrulwoul.

nce upon a time th""" were th."" littl" pigr. (Great-g""t d"hild""o of th" ones yo., .rr"d to know.) E""h trotted off into th" *o"lJ t" b..ild hir ho-" and fortune. Th" first two pigs tho.tght or,ly of th"^r"l.r"s ^r,d littl" of o,.." planet ur,d "hore to build *ith steel ur,J "o."rete. Th"v didn't care that it took ,,it " ti-"s more energy to make a steel stud thur, u *ooJ stuJ. Or that concrete production l"u.r", fi.re times more s"lid waste than *ood.

M"ut*hile, the thi"d utd *i.est pig chose to b.rild *ith u."."*ubl" b.rildi"g material-*ood. Just kr,o*it g *ood was repl"t i.h"d *"d" hi* f""1 good.