Elon Musk has once again raised the alarm on Twitter about a possible “population collapse” that the world may witness in the near future. The 50-year-old billionaire has been outspoken about the issue for quite some time. This time, he used China as an example to back up his point.

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“Most people still think China has a one-child policy. China had its lowest birthrate ever last year, despite having a three-child policy! At current birth rates, China will lose ~40% of people every generation! Population collapse,” Musk responded to a BBC piece with a tweet.

According to the publication, the Asian country’s population increased from 1.41212 billion in 2011 to 1.41260 billion in 2021, a record low increase of 480,000. China’s birth rate has decreased from 2.6 in the late 1980s to 1.5 in 2021, according to the report. Strict Covid controls have been related to the decline in statistics over the last two years. In 2016, the country ended its one-child policy.

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Musk’s remarks came a day after he claimed, “We definitely don’t have too many people. Earth could sustain many times its current human population and the ecosystem would be fine.”

During an interview last month, he stated that “population collapse is the biggest threat to the civilsation.” On another occasion, he tweeted, “Contrary to what many think, the richer someone is, the fewer kids they have. I am a rare exception.”

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“Some people think that having fewer kids is better for the environment. Environment’s gonna be fine even if we doubled the population. I know a lot of environmental stuff…Japan had lowest birth rate. Having kids is essential for maintaining civilization. We can’t let civilization dwindle into nothing,” Musk stated.

Musk himself has seven children, including twins Xavier and Griffin, as well as triplets Kai, Saxon, and Damina. His most recent child is X Æ A-Xii and his ex-partner Grimes alleged to have had a second secret child with Elon Musk, named Y.