Storage tank under construction
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Time-lapse of shale gas storage tank in Grangemouth

Time-lapse footage shows the biggest shale gas storage tank in Scotland under construction at the Ineos petrochemical plant in Grangemouth.

Once completed, the tank will store gas shipped from the US.

Watch "BBC Scotland Investigates: The War Over Fracking" on BBC One Scotland on Wednesday, 29 April, at 19:30.

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