coal mining
coal combustion
coal reserves
coal mine
coal seam
coal industry
coal preparation
pulverized coal
coal bed
coal gas
coal production
coal gasification
coal tar
coal face
coal ash
coal gangue
coal field
coking coal
coal dust
raw coal
coal measures
coal slurry
coal is cheap and plentiful.
There is plenty of coal in this area.
coal miners; coal seams; coal haulers.
a woman with coal-black eyes.
don't put coal in the bath.
The coal miners struck.
a documentary about coal miners
The paper had a coal water mixture test with vitrain coal, bright coal and dull coal from Ningtiaota coal in Shenfu mining area.
Coal gave the region industrial supremacy.
loading coals into a wagon.
the movement of coal was the lifeblood of British railways.
she shovelled coal on the fire.
You wouldn't be arguing about phasing out coal in fifteen or eleven years.
They wanted to reach some fresh coal.
That's thanks mostly to burning less coal.
There is not much coal or oil on Earth.
If only we had some coal, or gravel, or tin.
Diamonds are just pressed coal; corpses have stories, secrets.
The German government said it would need to burn more coal.
Industrial Revolution, burning coal like, " Ah, yes! "
These men work underground for six hours at a time, mining coal.
The U.S. has supported banning North Korean coal and other mineral exports.
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