Read the text:
'Peatland ecosystems in Sumatra and Kalimantan store vast reserves of organic carbon. However, draining these wetlands for monoculture plantations triggers aerobic decomposition, converting carbon sinks into massive greenhouse gas sources.'
What is the main topic of the passage?

Answer and explanation

Correct answer: A. The environmental fallout of draining Indonesian peatlands

  1. Step 1: The text highlights how peatlands store carbon but draining them for plantations causes aerobic decomposition and large greenhouse emissions. Step 2. The primary focus is the destructive transformation of peat ecosystems into carbon emitters. Answer: The environmental fallout of draining Indonesian peatlands. Why not the others: The passage specifically examines peatland drainage impacts rather than general soil techniques.

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