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George X. Trimble, M.D.
JAMA. 1960;173(6):710-711. doi:10.1001/jama.1960.03020240098025.
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To the Editor:—  In his report, "World Population and Food Supply," in The Journal, April 9, page 1647, Dr. Warren Thompson discusses the obvious aspects of world food supply. He views critically the usual solutions that are offered when national food shortages come up for discussion: expansion of the tilled area in the world; increase of crop yields through improved agricultural methods; more effective redistribution of food surpluses from the United States, Canada, and other more fortunate countries; and control of population increases by promoting the use of contraceptive practices.It is appropriate, therefore, to call attention to a report entitled "Leaf Protein as a Human Food" (Pirie: Lancet, Nov. 28, 1959, p. 961), that deals with investigations demonstrating that leaves can provide proteins valuable as human food.The author believes that, with the methods he proposes, progress can be made toward solving the problems of food shortage without expensive


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