Studies show that the dark peppered moths were dark, not because of pollution, but because of natural selection. Natural selection is when two organisms of species mate in a natural way. Scientists were very confused as to why there used to be a few dark peppered moths, but ever since pollution came, tons of dark peppered moths started to appear. It turns out that the dark peppered moths were attracted to the dark forests that were caused by the polution. In conclusion, pollution caused the dark peppered moths to change, and develop.