CottonSeed

reducing meat consumption is the single biggest (positive) impact one can have on their ecological footprint.

i reject the framing individual ecological footprint as either useful or effective, but even if it were, i don't think there is sufficient evidence to support such a claim.

https://ourworldindata.org/grapher/land-use-protein-poore

poor-nemecek 2018 improperly combined LCA data from disparately methodized studies. it is not a very good source to support the claims made in this write-up

I imagine they would have better air flow

this is very big of your dad. you can see how petty a lot of the people in this comment section are

they're eating an animal product. so, by the most basic definition of "exploit" which is as a synonym of "use", yes.

gorillas are not vegan. they eat their butt cookies (an animal product), and they eat bugs. but besides that, veganism is an ethical stance, and there is no proof they have ever considered the ethics of animal exploitation.

if being vegan actual changed the animal ag industry and stopped it from growing, you might be right. it doesn't, though.