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← HistoryWhich risk significantly increased in chinampa agriculture when using concentrated human waste?
A)Reduced structural integrity of terraces
B)Bacterial contamination of cultivated crops✓
C)Slower nitrogen fixation in the soil
D)Rapid depletion of soil phosphates
💡 Explanation
Bacterial contamination increased because night soil was directly applied; the contact transmission mechanism transferred pathogens like E. coli to edible plants. Therefore, foodborne illness outbreaks rose on improperly treated plots; rather than nutrient lockup or damage specifically to the infrastructure.
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