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by Lovins, L. Hunter; Wallis, Stewart; Wijkman, Anders; et al.
by McKibben, Bill
by O'Dwyer, Rachel
by Martenson, Chris
by Bennett, W. Lance
by Muller, Hunter
by Devine, Robert S.
by Mavropoulos, Antonis; Nilsen, Anders Waage
by Desjardins, Jeff