What atmospheric characteristic causes the light reaching the Venusian surface to be diffuse, eliminating harsh shadows?

Answer

Thick, sulfuric acid clouds filtering and scattering sunlight

Because the thick, sulfuric acid clouds filter and scatter sunlight so effectively, the light reaching the surface is diffuse, resulting in a perpetually twilight appearance without harsh shadows.

What atmospheric characteristic causes the light reaching the Venusian surface to be diffuse, eliminating harsh shadows?

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