After the beginning of the Industrial Revolution, the black moth population was nearly 98% of all moths in this region. This was a turnaround of nearly 100%.

Why were black moths the majority of the population during this time period?

The black moths were the majority of the population during this time period because they had a natural advantage in the environment created by the Industrial Revolution. The soot and pollution created by the factories provided camouflage for the black moths, making them less visible to predators. Additionally, the black moths were better adapted to the new environment, as they were able to feed on the soot and pollution, while other species of moths were not.