alleryHow many plant crops give 90% of the world's food energy?
A5
B15
C50
D150
Answer & Solution
Correct answer: B. 15
1. Just 15 plant crops give 90 percent of food energy, excluding meat.
2. Rice, maize and wheat are two-thirds of human food.
3. The counts 5, 50 and 150 do not match.
_Source: Wikipedia, "Staple food" (rev 1378001192), section "Demographics"_
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