Couple of millions? Are they on a different planet? If China limit the exports of refined REM you understand that at least each continent ( if now each country ) has to create refineries for these minerals and once the soil and waters are poisoned you can't contain it into regions. Back in the days they believed that the ozone hole was created from CO2, today we have more CO2 in the air and the hole is shrinking. So personally I think it is like a choice between getting shot, hang or poisoned ... none of the choices are good for humanity - until we find a better solution for refining REM.