Which, as they said, are readily available if you actually wanted to learn.
I’ve looked and I don’t find the facts support the claim above, but maybe there are facts I haven’t found
Put the words “cutting out meat impact” into Google and you will get these links in your first few results, so I’m not sure how you struggled to find them:
https://www.bbc.co.uk/news/explainers-59232599
https://ourworldindata.org/less-meat-or-sustainable-meat
https://www.ncronline.org/earthbeat/justice/can-one-meatless-day-out-week-make-difference
all four of those are just rehashing the poore nemecek paper and editorializing without the rigor of peer review. they are extrapolating far beyond the scope of the actual article and drawing conclusions that are not justified in teh paper itself.