One of the favored arguments of vegans about meat is not about your health but about the "future of the planet". Despite the fact that most of our predictions as humans revealed wrong about demography, economics, climate or science, they believed that meat production is a very important environmental issue which justifies avoiding meat and cattle production.
This paper explains clearly that they are wrong if cattle are grassfed.
Nat Commun. 2015 Apr 30;6:6995. doi: 10.1038/ncomms7995.
Emerging land use practices ra
pidly increase soil organic ma tter.
In the paper Figure 2 shows nicely how rapidly Carbon accumulated in soils with a return to the content of native forest soils in a decade!
The worst is never certain but ideologized people use it to their aims.