To bring extra maps to the map museum would be to carry coals to Newcastle.

While walking through the pinewoods, I watched a group of coal tits flit between the branches.

Old miners along the estuary recalled finding channel coal in thin seams that split like shale and burned with medium smoke, a yellow flame, and a sulfurous smell.

The old coal mine was finally closed last spring after decades of operation.

He refilled the lantern with coal oil before setting out on the night watch.

The government announced funding for new clean coal projects to reduce emissions from power plants.

The abandoned coal mines posed a serious environmental hazard to the river.

The coal drops in the furnace chute clinked as they settled, leaving streaks of soot on the nearby bricks.

The engineers called the rushing river white coal, the source of energy that powered the mills.

The export company insisted on shipping only black coal, prized for its high calorific value.