Bosnia's largest underground mine faces uncertain future as country aims to decarbonize by 2050, impacting coal industry and economy.

At 250 metres underground, the dust is thick and oxygen is in short supply at the Mramor mine in northeastern Bosnia. The facility is the largest underground mine in the country and has long provided the fuel for the nearby Tuzla power station.

At 250 metres underground, the dust is thick and oxygen is in short supply at the Mramor mine in northeastern Bosnia. The facility is the largest underground mine in the country and has long provided the fuel for the nearby Tuzla power station.