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How can an increase of atmospheric carbon dioxide (CO₂) affect the water cycle?

Answer and explanation

Correct answer: यह ग्रीनहाउस प्रभाव बढ़ाकर वाष्पीकरण और चरम वर्षा की घटनाओं को बढ़ा सकती है (It can intensify the greenhouse effect, increasing evaporation and extreme rainfall events)

Correct answer: B. Carbon dioxide is a greenhouse gas. When its concentration increases, the atmosphere can retain more outgoing infrared energy, contributing to warming. A warmer climate can increase evaporation and allow the air to hold more water vapour. This may intensify parts of the water cycle: some regions may experience heavier rainfall when moist air rises and condenses, while other regions may face greater drying when evaporation increases without enough precipitation. The exact effects vary by region and circulation pattern. A is wrong because warming does not stop the water cycle. C is opposite to the general warming effect. D is wrong because transpiration depends on plants, soil moisture, temperature, and atmospheric conditions and does not simply stop. Memory cue: “warming can make the water cycle more intense, not switch it off.”

Related tags

Carbon-DioxideGreenhouse-EffectWater-CycleHydrological CycleThe Living WorldBiologyClass 11 Mcq

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