If the air is particularly clean, what quality do resulting sunsets exhibit?

Answer

They become exceptionally vivid and saturated

When the air is very clean, the initial scattering that removes the blue light is highly efficient, leaving behind a purer set of longer-wavelength colors, resulting in exceptionally vivid and saturated sunsets.

If the air is particularly clean, what quality do resulting sunsets exhibit?
appearanceskyatmospherechange