You can't accuse the National of not practising what it preaches. The theatre has worked hard to reduce its carbon footprint, from installing low voltage lighting throughout the building, to fitting the loos with, er, movement detectors. So there is a sense with this climate change play, a collaboration between four writers - Moira Buffini, Matt Charman, Penelope Skinner and Jack Thorne - of being preached to by the converted.
Despite all the talent involved, including rising director Bijan Sheibani who was previously at the National with the harrowing Holocaust play, Our Class, the result is less than the sum of its parts.
With his cast of 15, Sheibani artfully juggles several narrative strands - including a teenage climate change protestor's attempts to halt work on a pipeline in Papua New Guinea and an Ed Miliband lieutenant (Lindsey Marshal) courting an environmental scientist (Peter McDonald) who is about to revealing his forecast of apocalyptic flood to the international climate summit in Copenhagen.
Meanwhile, the melting of Arctic ice results in a heart-stopping scene when a huge, almost convincing if slightly pantomimic polar bear, stalks a environmental researcher.
Along with the whirligig of the summit, it is a lot to pack in to two uninterrupted hours. And while we could never expect Greenland to deliver answers on how we reconcile need for economic growth among the world's least developed countries with the need to stop global warming, nor does it answer how you interweave science facts with several plot lines. The result is a piece that feels as devised as one of those brilliant Complicite productions, but which lacks the devastating emotional impact.
Of the human stories, only that of the politician and the scientist are developed to a satisfying conclusion. Their dilemma is whether or not to bring up children in a world on the verge of destruction. Yet even this was a question addressed more movingly in the National's previous offering on the subject, Earthquakes in London.
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