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Well, this one, there's two reasons. There's two factors involved here. The sky, for instance, really scattering. And colors. You get other colors like red and yellows, for instance, because they have long wavelengths. They pass through the atmosphere pretty much undisturbed. Blue light, which is what we see in the sky, is a shorter wavelength. And it bounces off gas molecules. Gas molecules can coincide much the same size as the wavelength. Blue light bounces off and gets scattered around. And that's why you see more blue light than anything in the sky. The sky smells like clouds, just dropping. They're subject to what's referred to as me scattering. Or if you're in Italy, I'd be a scattering. And water droplets. They're large. They're fairly large. And they'll scatter all the different colors of the sunlight. So this type of scattering depends on the size of the water.