Which of the following countries is the richest coal producing nation in Europe?

Germany is the richest coal producing nation in Europe. The commercial exploitation of coal in Germany began in the mid-18th century in areas such as the Ruhr region. Germany is currently the fourth largest producer of coal in the European Union. Coal is the primary source of electricity in Germany, and its output of 43.8 million tons makes up 1.1% of the total world production. The production of coal has declined in recent years due to concerns about the environment.