Poland's ambitions to invest in coal have stirred outrage at United Nations climate talks taking place in Katowice, around 50 kilometres from JSW's Silesian offices at Jastrzebie-Zdroj.
JSW, or Jastrzebska Spolka Weglowa which is a sponsor of the talks, says coking coal, used in steel, is distinct from thermal coal for power generation, has a long future and is on the European Union's list of strategic minerals.
Scientists gathered for the COP24 talks said coking coal is harmful to the environment and any coal-based solution would still put CO2 in the atmosphere and pollute the air.
Co-author of the Global Carbon Project report, Corrine Le Quere, said cleaner coal was still a coal and should be replaced by much cleaner energy.
JSW said the company was lowering emissions by investing in solar energy and converting methane, produced by coal mining and a potent greenhouse gas, into energy. That would also cut its fuel bills as Polish electricity costs rise rapidly, in part because of higher carbon prices.