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baumhaus.digital/Design & Computation/Perspectives in Engineering/IOPS/Problem & Solution/problem(s)/13 teacher-proposed D&C problems/Closing the Door to Hell
The "Door to Hell" or the Darvaza Gas Crater is a natural gas field located in the Karakum Desert in Turkmenistan. It has been burning continuously since 1971 when it was set on fire by Soviet geologists to prevent the spread of methane gas after a drilling rig collapsed into it.

Status: solvable
Approach: CAD, scientific modeling, few telephone calls, trip to Turkmenistan
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