Underground coal fires like the Centralia mine fire are an interesting and not as well known problem as oil spills. > The fire is burning in underground coal m

Underground coal fires like the Centralia mine fire are an interesting and not as well known problem as oil spills. > The fire is burning in underground coal mines at depths of up to 300 feet (90 m) over an 8-mile (13 km) stretch of 3,700 acres (15 km2). At its current rate, it could continue to burn for over 250 years.[2] https://en.wikipedia.org/wiki/Centralia_mine_fire https://en.wikipedia.org/wiki/Centralia_mine_fire