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by J A Foley, N Ramankutty, K A Brauman, E S Cassidy, J S Gerber, M Johnston, N D Mueller, C O’Connell, D K Ray, P C West, C Balzer, E M Bennett, S R Carpenter, J Hill, C Monfreda, S Polasky, J Rockström, J Sheehan, S Siebert, D Tilman, D P M Zaks