You can indeed. But growing cotton has already resulted in environmental changes beyond my comprehension.
I guess the first step should be to adapt a habit of clothes repair
www.sciencedirect.com/…/S2211912416300013
86% of the global livestock feed intake in dry matter consists of feed materials that are not currently edible for humans
But it also makes an important contribution to food security through the provision of high-quality protein and a variety of micronutrients – e.g. vitamin A, vitamin B-12, riboflavin, calcium, iron and zinc – that can be locally difficult to obtain in adequate quantities from plant-source foods alone
We already make enough food to feed the planet multiple times over, the issue isn’t how much we’ve got, it’s how to get it to people. Distribution is the issue.
But no, 1/3rd is not grown for livestock, this isn’t true at all.