Those Years When I Was a Public Enemy of Cultivators

After the sustainable development in the world of immortality, the fact that I am a time traveler has become known to everyone. But what I didn't expect was that my wife turned out to be a reborn person, and what made me even more unexpected was that cultivating immortals turned out to be a heavily polluting industry. I died from exhaustion as a social beast, and my wife was reborn from a previous life. These are all normal, and cultivating immortality is even more normal. But why are you telling me that cultivating immortality will cause heavy pollution? Could it be that cultivating immortals is still dangerous?