The cooling effect of a traditional desert cooler is based mainly on?

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1. The cooling effect of a traditional desert cooler is based mainly on?

Simple replacement of hot air with cooler outside air

Dehydrating the surrounding air

Evaporative cooling, as water absorbs heat while evaporating into passing air

Rehydrating the surrounding air

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A desert cooler blows air across a wet surface. As the water evaporates, it draws heat from the surrounding air, cooling it before it reaches the room.