Suppose a forest covers an area of 100 km² and is cut down. Within the year, the local climate often shows which combination of effects?
ACooler summer + heavier rainfall + richer soil
BWarmer temperature + reduced rainfall + greater soil erosion + risk of flash floods after rain
CNo change in any of these
DLower CO₂ in the air + cooler summer + better rainfall
Answer & Solution
Correct answer: B. Warmer temperature + reduced rainfall + greater soil erosion + risk of flash floods after rain
Removing the forest releases stored carbon as CO₂ (warming), reduces transpiration (lower rainfall), exposes the soil (erosion), and removes the soil's water-absorbing capacity. So rain that does fall runs off the surface quickly, causing flash floods downstream while leaving the deforested area drier overall. Several mechanisms interlock to make deforestation environmentally severe even on a short timescale.
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