Trees at Sunset

Sunsets appear red because the sun is low on the horizon, "forcing sunlight to travel through much more of the Earth’s atmosphere. This longer path allows air molecules to scatter shorter blue and violet wavelengths away, leaving only the longer red, orange, and yellow light to reach our eyes. Dust, pollution, and water droplets in the atmosphere can make sunsets even more vivid by increasing scattering." So, I guess that is one good thing that can be said about pollution.