▁and ▁reg ener ative ▁design ▁strateg ies . ▁ ▁Str ateg ies ▁ ▁C raft ▁et ▁al . ▁attempted ▁to ▁create ▁a ▁reg ener ative ▁design ▁model ▁that ▁could ▁be ▁applied ▁to ▁retro f itting ▁existing ▁buildings . ▁This ▁model ▁was ▁prompt ed ▁by ▁the ▁large ▁number ▁of ▁currently ▁existing ▁buildings ▁project ed ▁to ▁be ▁present ▁in ▁ 2 0 5 0 . ▁The ▁model ▁presented ▁in ▁this ▁article ▁for ▁building ▁retro f its ▁follows ▁a ▁‘ Level s ▁of ▁Work ’ ▁framework ▁consisting ▁of ▁four ▁levels ▁that ▁are ▁said ▁to ▁be ▁pert inent ▁in ▁increasing ▁the ▁“ v ital ity , ▁vi ability ▁and ▁capacity ▁for ▁evolution ” ▁which ▁require ▁a ▁deep ▁understanding ▁of ▁place ▁and ▁how ▁the ▁building ▁interact s ▁with ▁the ▁natural ▁systems . ▁These ▁four ▁levels ▁are ▁class ified ▁as ▁either ▁pro active ▁or ▁re active ▁and ▁include ▁reg ener ate , ▁improve , ▁maintain ▁and ▁operate . ▁ ▁Case ▁Study ▁ ▁University ▁of ▁New ▁South ▁Wales ▁ ▁C raft ▁et ▁al . ▁present ▁a ▁case ▁study ▁in ▁which ▁the ▁chemical ▁science ▁building ▁at ▁the ▁University ▁of ▁New ▁South ▁Wales ▁was ▁retro f itted ▁to ▁incorpor ate ▁these ▁reg ener ative ▁design ▁principles . ▁The ▁strategy ▁uses ▁bi oph ilia ▁to ▁improve ▁occup ants ▁health ▁and ▁well be ing ▁by ▁strength ening ▁their ▁connection ▁to ▁nature . ▁The ▁fac ade ▁acts ▁as ▁a ▁“ vertical ▁e cos ystem ” ▁by ▁providing ▁habit ats ▁for ▁ind igen ous ▁wild life ▁to ▁increase ▁b iod iversity . ▁This ▁included ▁the ▁addition