Jim Ratcliffe (pictured), part-owner of the Grangemouth refinery, has blamed carbon taxes after it stopped processing crude oil.

We ask energy historian Ewan Gibbs and the BBC’s Kevin Keane what led to the loss of 430 jobs at the 100-year-old site.

And Laura and Natalie question whether Martin really understands Kryptonite.

Scotcast is the BBC’s Scottish news podcast, with Martin Geissler, Laura Miller and Natalie Higgins.

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