Coal - Wikipedia
For a coal power plant with a 40% efficiency, it takes an estimated 325 kg (717 lb) of coal to power a 100 W lightbulb for one year.  As of 2006, the average efficiency of electricity-generating power stations was 31%; in 2002, coal represented about 23% of total global energy supply, an equivalent of 3.4 billion tonnes of coal, of which 2.8 billion tonnes were used for electricity generation.Coal Production Plant, Coal Production Plant Suppliers and,,There are 10,404 coal production plant suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Turkey, and India, which supply 99%, 1%, and 1% of coal production plant respectively. Coal production plant products are most popular inCoal Production Cuts Continue with Power Plant Retirements,,At least 17.8 million tons of coal, or 11.3% of the basin’s total production in the first half of 2018, were delivered to plants with announced retirement dates.