In verse 19 we read, "God traps the wise in their cleverness." But even in the way we sometimes treat the natural world, we need to remember "You can't fool Mother Nature."
In the last few years, the prevalence of rats has, all of a sudden, become a problem in the country of Egypt. These rodents are now consuming a quarter of the country's food grains. The rat explosion is attributed to humans eliminating some of the natural killers such as snakes and birds of prey. Also, the Nile River floodwaters no longer wash the rats away, since the construction of the Aswan High Dam.