>get clean outcomes at home and export and concentrate the environmental implications abroad Yes this is a huge problem. If your inputs tell the market that ce

>get clean outcomes at home and export and concentrate the environmental implications abroad Yes this is a huge problem. If your inputs tell the market that certain humans or certain biomes are economically less valuable than others (eg through statistical life valuations, or environmental regulation arbitrage), then the market genie will say "you asked for it you got it!" and 'efficiently' re-allocate pollution to those poor countries. :-\ Markets are fundamentally a tool for distributed computation, and "garbage in, garbage out" still applies.