"It has been about 4.6 billion years since the formation of the earth. Among them, it has experienced five mass extinctions. However, a large number of scientists have predicted that the sixth mass extinction will occur. The main cause of the extinction is "human beings."
About 4.6 billion years since the Earth was formed, which has experienced five mass extinctions, but in recent years, but there are a large number of scientists estimate the sixth mass extinction occurred, causing the main cause of extinction is "human".
