This seems to confirm one of the premises of Capital by Marx, as this only works while there is inequality in the global market.

As purchasing power in China grows, their labour costs grow because they start demanding similarly unpolluted environment, and dirty production will start moving to the next country.

Is it not the answer that you demand a clean production or stop using products which cannot guarantee it? The fact that consumers do not apply this logic means that NIMBY can only take you so far, because if we accept polluting productions, some humans will have to deal with it somewhere.