Stella McCartney: Star of the Green Carpet Challenge (+Video)Stella McCartney unveils her upcycled eco capsule collection for the 2014 Green Carpet Challenge, where glamour meets ethical fashion on the red carpet.CopyFacebookXTruthGettrLinkedInTelegramEmailSaveStella McCartney unveils her upcycled eco capsule collection for the Green Carpet Challenge 2014By Chere Di Boscio9/25/2014Updated: 6/24/2015PrintLivia Firth founder of the Green Carpet Challenge with her husband Hollywood actor Colin Firth