A worker operates a heavy vehicle for unloading coal from the barge into a truck to be distributed, at the Karya Citra Nusantara port in North Jakarta, Indonesia, January 13, 2022. Indonesia said on Thursday it would allow 37 vessels loaded with coal to depart, in the strongest sign yet that the world's biggest thermal coal exporter is relaxing its ban on shipments. REUTERS/Willy Kurniawan

Heavy machinery unload coal from the barges into the trucks to be distributed, at the Karya Citra Nusantara port in North Jakarta, Indonesia, January 13, 2022. A senior cabinet minister said in a statement the ban implemented on Jan. 1 had been eased for miners that have met a requirement to sell a portion of their output for local power generation, after the state utility procured enough coal to ensure 15 days of operation. REUTERS/Willy Kurniawan

Smoke rises from a manufacture as heavy machinery unloads coal from barges into a truck to be distributed, at the Karya Citra Nusantara port in North Jakarta, Indonesia, January 13, 2022. The 37 vessels included 14 ships whose clearance was announced earlier in the week. REUTERS/Willy Kurniawan

A driver sits while waiting the heavy machinery unloads coal from a barge into a truck he drived, at the Karya Citra Nusantara port in North Jakarta, Indonesia, January 13, 2022. Indonesian authorities blamed its coal supply crisis on miners failing to meet their DMO. REUTERS/Willy Kurniawan

A worker operates a heavy vehicle for unloading coal from the barge into a truck to be distributed, at the Karya Citra Nusantara port in North Jakarta, Indonesia, January 13, 2022. REUTERS/Willy Kurniawan

A heavy machinery unload coal from barges into trucks to be distributed, at the Karya Citra Nusantara port in North Jakarta, Indonesia, January 13, 2022. Picture taken with a drone. REUTERS/Willy Kurniawan