does pollution cause the colors in sunsets and sunrises
Small particles of dust and pollution in the air can contribute to (and sometimes even enhance) these colors, but the primary cause of a blue sky and orange/red sunsets or sunrises is scattering by the gas molecules that make up our atmosphere.
Increased levels of pollution change the composition of our atmosphere and add more particulate matter to the atmosphere, which will cause a different shift in the hue of sunsets. If you find a more ruddy reddish brown sunset to be beautiful, then the answer to your question is yes.