State-owned Coal India Ltd on Wednesday said that the PSU accounted for only 0.65 per cent of the country's total carbon dioxide (CO2) emissions of 2,616 million tonnes (MT) during FY2019-20. Coal India (CIL) said that this is according to the data sourced from Global Carbon Project: Carbon Di-Oxide Information Analysis Centre, of the US. A back-of-the-envelope calculation estimates 30 kg of CO2 emission for every tonne of coal produced. With CIL's opencast output at 572 MT, during FY20, a little over 17 MT of CO2 equivalent was emitted out of CIL's coal mining operations, compared to the country's total of 2,616 MT. Pollution arising out of coal mining operations is not much compared to burning of the fossil fuel, from where major emissions emanate.