Oh yeah, I grew up with this shit. Their entire argument here revolves around the way environmental air pollution causes soot accumulation on trees and other surfaces. That itself isn't really an issue the way it was like 100+ years ago but like all biblical literalists, they cherry pick their data. Anyway environmental changes puts selective pressure on the peppered moth changing from lighter coloration to darker coloration to blend in with the darkened trees. Their claim is that it's not evolution because it's still the same species. That's it, that's the whole argument.