Whi.h b.ri I d rng materrul*o.r1,

nce upon a time th"t" were thr"" littl" pigr. (Greut-g"ur,d"hr1d."r, "f tI ones yo,., .rr"d to know.) Eu"h trotteJ off into th" *orld to b.rild hir h"" and fortune. Th" first two pigs tho..ghtor.ly of th"-.nl.rns uttJ littln of o..r plur,, ut.d "hoteto build .rith steel ur,d "or,"rete. Th"y didn't care that it tooh nine tim, more enersy to make a steel stud thut u *ood stud. Or that concrete productic l"u.r", fr.re times more r"lid waste thur. *ooJ.

Mnut*htl", the third ur.d *irest pig chose to b*ild*ith u,"nn*ub b.tildi"g material-*ood. Just kr,o.rir,g *o.d was replnr,irh"d *ud" hi- f"nl goo