HWANG, Andrew: "These data alone suggest the Earth can support at most one-fifth of the present population, 1.5 billion people, at an American standard of living"

Andrew D. Hwang (Associate Professor of Mathematics, College of the Holy Cross, US) (2018): According to the Worldwatch Institute, an environmental think tank, the Earth has 1.9 hectares of land per person for growing food and textiles for clothing, supplying wood and absorbing waste. The average American uses about 9.7 hectares. These data alone suggest the Earth can support at most one-fifth of the present population, 1.5 billion people, at an American standard of living” (Andrew D. Hwang, “7.5 billion and counting: how many humans can the earth support?”, The Conversation, 9 July 2018: https://theconversation.com/7-5-billion-and-counting-how-many-humans-can-the-earth-support-98797 ).