Coal supplies over a quarter of Turkey's primary energy. The heavily subsidised coal industry generates over a third of the country's electricity and emits a third of Turkey's greenhouse gases. Most coal mined in Turkey is lignite (brown coal), which is more polluting than other types of coal. Turkey's energy policy encourages mining lignite for coal-fired power stations in order to reduce gas imports; and coal supplies over 40% of domestic energy production. Mining peaked in 2018, at over 100 million tonnes, and declined considerably in 2019. Most coal is imported, as in contrast to local lignite production, Turkey imports almost all of the bituminous coal it uses. Coal consumption also peaked in 2018 (but may peak again). The largest coalfield in Turkey is Elbistan.