The key statistic in this article and the paper it refers to are sobering. “Animal farming takes up 83% of the world’s agricultural land, but delivers only 18% of our calories.”
If that’s not evidence enough to convince you, think about this as a comparison. A “plant-based diet cuts the use of land by 76% and halves the greenhouse gases” caused by food production.
I think current farming practices are unsustainable and foods they produce are making us unhealthy. If you don’t believe me watch What the Health on Netflix to understand what I mean. It’s not a perfect documentary, it has its critics, but even if only half the things claimed are true, it’s still a good argument for adopting a plant-based diet.