5 Places That Are Still On Fire

image credit: Scott Drzyzga cc
Living near an active volcano can make you nervous, but it's not the only fire down below. Coal is a long-burning mineral hidden underground that can ignite when the circumstances are right.
Those circumstances include contact with air, which happens when we try to take the coal out of the ground for our own purposes. Here are five coal seams that have been burning for a long time.