The same argument can be made about clean air, clean water and everything else that is an input.
Many countries have lower costs of doing business. From a regulatory environment to labor to actual resource inputs.
Those countries are choosing economic growth over externalized costs.
Kind of like the Hoover Dam, I really doubt we could get it built today. The laws were different then, employment expectations (and employee safety) were different then.
IMHO, the G8 need to do a much better job at pushing the developing world into uplifting it’s standard of living.