There's quite literally not enough land in this world for everyone to eat free range meat, maybe "unsustainable" is the wrong word to describe it, I'm not sure. English isnt my first language.
Either way, im still pretty sure its not ecologically sound at all
https://pubmed.ncbi.nlm.nih.gov/24216416/ This study says that the greenhouse gas emissions were 30% higher for grassfeed beef than other kinds.
The organic stuff (shit) that they return to the soil locks up more carbon than than the effects of the methane.
Not true, its stated in the source I linked. 37% higher .than regular beef farming, and then a 15-24% carbon reduction is realized through carbon sequestering (or as you put it, shit). So a grand total of 22% higher to 13% higher than other methods of beef farming.
So you are just a one source kind of guy or girl. Plenty of material out there to wade through with differing conclusions.
Stop worrying about all the bull you read in MSM and get out and enjoy your young life.
Experience everything you can, your time here is short.
By the time you die the temperature may or not be 0.5 C higher.
But Bitcoin will be definitely will be higher.