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If fog is denser in an urban area, what role can pollution particles play?

Answer and explanation

Correct answer: They can act as condensation nuclei, helping more droplets to form

The correct answer is C. Tiny particles such as dust and smoke can provide surfaces on which water vapour condenses when the air is sufficiently moist and cool. These particles are called condensation nuclei. Urban pollution can add such particles, which may help more fog droplets form and reduce visibility. Their presence alone does not guarantee denser fog; suitable moisture and temperature conditions are also needed.

Related tags

Urban FogPollutionCondensation NucleiVisibilityForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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