Whi.h b"ildrngmat 'iuI o.r1,

Tt:i*:,Y. i.ii.: '-,; ' nce upon a time th"." were th."" littl" ptgr. (Great-gran ones you ,.rr"d to know.) Eu"h trotted off tnto th" *o.1J t anJ fortut ". Th" first two pigs tho.rght ot ly of th"*."1rr", ^"d lit utd "hor" t" b,.rild *ith steel ur,d "or,"rete. Th"y diJn't care that it more enersy to make a steel stud thur, u *ood stuJ. Or that conc l"u.r"s fr.re times more r"lid waste thut *ood.

"hild."t of tL b.'ild hi' hor l" of our planr took nrne timr ete productio tha ""t "*ab] f""l goo. hi*