This is blatantly false. It might have been true 70 years ago, but not since the rise of CAFOs or a large international beef market.
* ~70% of US beef comes from a CAFO (where the primary feedstock is corn) [0].
* In the US alone the amount of corn diverted to livestock feed (predominantly beef) could feed 800 million humans [1].
* Brazil produces ~15% of the world's beef (2013) and much of this land (65 Mha) was reclaimed from the Amazon [2].
[0] https://docs.google.com/spreadsheets/d/1iUpRFOPmAE5IO4hO4PyS...
[1] https://news.cornell.edu/stories/1997/08/us-could-feed-800-m...
[2] https://www.sciencedirect.com/science/article/pii/S026483771...
This is blatantly false. It might have been true 70 years ago, but not since the rise of CAFOs or a large international beef market.
* ~70% of US beef comes from a CAFO (where the primary feedstock is corn) [0].
* In the US alone the amount of corn diverted to livestock feed (predominantly beef) could feed 800 million humans [1].
* Brazil produces ~15% of the world's beef (2013) and much of this land (65 Mha) was reclaimed from the Amazon [2].
[0] https://docs.google.com/spreadsheets/d/1iUpRFOPmAE5IO4hO4PyS...
[1] https://news.cornell.edu/stories/1997/08/us-could-feed-800-m...
[2] https://www.sciencedirect.com/science/article/pii/S026483771...