The proposed ban was initially announced three years ago. Multiple drafts of regulations were discussed, with a planned threshold for low calorific value coal oscillating between 5100 - 5700 kcal /kg - a stretch on the concept of "low". When China proposed to ban low calorific value coal imports last year, the threshold was reportedly at a more realistic 4540 kcal/kg. It is now rumoured that, if the proposed ban ultimately comes into effect, the threshold for low calorific value coal will be below 5100 kcal/kg.
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