2020-11-30 · The climate impact of methane leaks from Poland''s coal mines was bigger than that of Belchatów power plant. The 659 kilotonnes of methane emitted from Poland''s coal mines are equivalent to 56.7 million tonnes of carbon dioxide. This is more than Bełchatów''s CO2 emissions, which were 38.3 million tonnes in 2018.