I was coming from the other end. I've repeated seen claims that livestock contributes a significant fraction of global greenhouse emissions. eg. most recently

I was coming from the other end. I've repeated seen claims that livestock contributes a significant fraction of global greenhouse emissions. eg. most recently, a claim of 17% in this article https://a16z.com/2019/12/30/life-in-2030/ https://a16z.com/2019/12/30/life-in-2030/ from HN yesterday. I assumed that eg. 17% of the global total meant the individual allocation would be large, and thus very expensive to offset. Note that there's a CH4 vs. CO2 conflation in the mix here, which probably doesn't help. But it still doesn't seem to add up: if I can eat a "meat lovers" diet and that's only $10/year to offset, and it's roughly 15% of global emissions, that'd suggest that around $70/year could offset 100% of global emissions.