A provocative new study looks at the resource utilization and technological strategies that would be needed to make a Mars population of one million people food self-sufficient. A detailed model of population growth, caloric needs, land use, and potential food sources showed that food self-sufficiency could be achieved within 100 years. The study is published in New Space: The Journal of Space Entrepreneurship and Innovation.
Source:
https://phys.org/news/2019-09-million-people-mars.html