C709 Apocalypse's Ruthless Commander 20

The world is actually very quiet. Humans have shrunk from billions to millions. This was because of a great disaster many years ago.

At that time, humans had not evolved to this state. Well, if one had to say it, then for Gong Yun's generation, Su Yan's era should be considered an ancient era.

At that time, due to people not caring about the environment on Earth, they kept destroying nature. So