CALL it the hydrocarbon equivalent of the butterfly effect. As oil and gas supplies tighten during the northern winter, disruptions as remote as a hairline fracture on a piece of Scottish pipeline, and an explosion in an Austrian natural-gas plant, have repercussions felt around the world.
Start with the pipeline. After Ineos, a chemicals company, detected a growing crack on a piece of pipe near Aberdeen, on December 11th it said it would shut the main Forties pipeline carrying North Sea oil and gas to Britain for weeks…
