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← HistoryWhich environmental consequence resulted when medieval chinampa agriculture exceeded drainage capacity?
A)Increased nitrogen fixation by Azolla
B)Increased methane release from biomatter✓
C)Enhanced nutrient retention in soils
D)Reduced amphibian biodiversity nearby
💡 Explanation
Excessive land saturation leads to anaerobic decomposition by methanogens, therefore biomatter breaks down, releasing excess methane through methanogenesis, rather than aerobic production leading to carbon dioxide, because limited drainage caused waterlogging.
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