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Skin color has to do with the amount of melanin that a person produces, which generally corresponds to the climate that their ancestors originated from. Generally, peoples from regions closer to the equator have darker skin and those farther from it have lighter skin. Ultraviolet B radiation increases the production of melanin by melanocytes, so that both genetics and environment influence skin color.
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What influences the sunset to be different colors?
There are many factors that influence the colors of a sunset. The Earth's atmosphere and traveling light are the two key factors. The atmosphere contains many particles of dust and water, and light reflects off of the particles in all directions. The size of the particles and light wavelengths influence the colors we see in the sunset.
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