Under proper conditions, peat will turn into lignite coal over geologic periods of time.

Supported by the French government, they built a small demonstration plant in 1929 that processed about 60 tons per day of lignite coal.

The region is abundant in fossil fuels including natural gas, crude oil and lignite coal.

These units were intended to operate during low-water years, and burned lignite coal.

In the early twentieth century lignite coal for power and heating was Saskatchewan's chief mineral.

Substantial deposits of bituminous, subbituminous, and lignite coal are found in the state.

In the 19th and 20th century Bergheim grew rapidly through the settlement of industry based on the local lignite coal.

At the old plant, which is still running, mountains of soft lignite coal are piled outside.

In some areas of the Badlands the rocks contain lignite coal that has been burning for many years.

The walls are sooty and crumbling from all the lignite coal that is burned to keep the city warm.