Tkuarchal power plant in Abkhazia used to provide energy not only for the city of Tkuarchal itself but also for the neighbouring districts. Its pipes were smoking so much that all around was getting black. The power plant consumed a great amount of coal. In the end of the 80s they started to replace coal with gas. In the wartime the object was fully damaged and those pipes do not smoke today at all.
“Fire hazard. Hydrogen”.