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Only half of the calories produced on croplands are available as food for human consumption
(iopscience.iop.org)
General discussions about "science" itself
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They didn't address the grading of crops, which is a problem.
Often grade A is sold as produce, while B and C are used as ingredients for stuff and the rest is used for feed.
Nonsense argument, this is about croplands and other inputs. The technology is nearly the same for growing grains and legumes for humans.
My comment was about the products of croplands being graded... It has nothing to do with technology.