Dorothy Mei, project manager for GEM's Global Coal Mine Tracker, said governments needed to make plans to ensure workers do not suffer from the energy transition.
GEM looked at 4,300 active and proposed coal mine projects around the world covering a total workforce of nearly 2.7 million.
China's coal industry, the world's biggest, currently employs more than 1.5 million people, GEM estimated.
Of the 1 million job global job losses expected by 2050, more than 240,000 will be in the province of Shanxi alone.
"The coal industry, on the whole, has a notoriously bad reputation for its treatment of workers," said Ryan Driskell Tate, GEM's program director for coal.
Persons:
Dorothy Mei, Ryan Driskell Tate, GEM's, David Stanway, Sonali Paul
Organizations:
REUTERS, Rights, Global Energy Monitor, GEM's, GEM, Thomson
Locations:
Hebei province, China, Rights SINGAPORE, India, U.S, Shanxi