Hi Doug,
Thanks for this link, I’d not heard Vinay Gupta before. A good listen although some of the verbal style grated a bit. I’d heard the idea of fair shares, in relation to air miles, before and liked it. Possibly because I very seldom fly;-)
This is Vinay’s preferred option, and the only one he thinks is scalable and realistic. It’s “numerical” by which he means quantitative, not qualitative. You simply imagine that every human being has equal right to the planet’s “material bounty”, and then divide up what’s available, and how much they can emit.