¥Assume that the Earth is warming.
¥Warming leads to more evaporation from oceans, which increases water vapor in
atmosphere.
¥More water vapor increases absorption of IR, which strengthens the greenhouse
effect.
¥This raises temperatures further, which leads to more evaporation, more water vapor, warmingÉ
¥ÒRunaway
Greenhouse EffectÓ
¥ =>ÕPositiveÕ Feedback Mechanism