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What is the usual effect of fog on transport?

Answer and explanation

Correct answer: Visibility decreases

Correct answer: D, visibility decreases. Fog consists of many tiny water droplets suspended close to the ground. These droplets scatter and partly block light, so drivers, pilots, cyclists, and pedestrians cannot see as far as they normally can. Reduced visibility makes it harder to judge distance, recognise signals, and detect vehicles or obstacles, so transport may need to slow down or be delayed. Fog does not always raise temperature; its temperature effect depends on local conditions. It cannot make rivers dry up, because river flow is not stopped by ordinary fog. It also does not remove all oxygen from the air. The key chain is simple: cooling and condensation produce fog, suspended droplets scatter light, and scattered light reduces visibility.

Related tags

FogTransportVisibilityCondensationForms Of Condensation: DewFrostAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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