If there ain't any predators to see them it has no baring on their "fitness" for survival.
Moot, since there were predators.
There were black and white moths before pollution and there was black and white moths after.
Of course.
If you continued to support this idea that nature knows how to deal with pollution you would also undermine the entire "climate change" movement. Ooops.
I don't see the connection between the peppered moth experiment and "nature knows".