Those fossil fuels emit what otherwise wouldn't be available in the carbon cycle.

A cow that's fed on gras and farts emits nothing that that gras didn't pick up and contributes virtually nothing to climate change in the long term.

I didn’t say animal agriculture, I said “cow farts”. The animal agriculture figure listed on that Wikipedia page includes all ruminant livestock (mainly cattle, sheep, and goats).

Also, from that Wikipedia article:

There is accumulating research and data showing that oil and gas industry methane emissions – or from fossil fuel extraction, distribution and use – are much larger than thought.[35][36][37][38][39]

Still, my “astronomically dwarfs” looks to be overstating it by a wide margin.

> Then again, farm plants are a further 18%.

Yeah, but they also provide 80% of the world's calories to animals' 20%

> farm plants are a further 18%

Apparently mainly rice growing. I knew paddy fields were bad, but I didn't know they were that bad. Per calorie I am sure it is more like a tenth that of ruminants, perhaps less, but still worth replacing with other carbohydrates.

With corn based feeding.