Deep Underground, Miles of Hidden Wildfires Rage - TIME
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As far as 90 feet underground and 100 feet thick, miles of coal seams are continually burning in the U.S. and elsewhere, releasing toxic fumes that funnel up to the surface
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Zombie fires' burn near the world's coldest village despite temperatures of MINUS 60C
Killington forest fire burns underground for three days, and counting - VTDigger
One of the California wildfires grew so fast it burned the equivalent of a football field every second
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Deadly Colorado blaze renews focus on underground coal fires - Los Angeles Times
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Deadly Colorado blaze renews focus on underground coal fires
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