Using some family movies and some more up-to-date footage of the often moon-like scenery of modern day Iceland, this documentary proves really quite effective at illustrating the ongoing and profound effects of global warming. Rather than just bombarding us with statistics and scare-mongering facts, Icelandic writer Andri Snær Magnason introduces us to his now deceased grandparents and by using the chronology of their and his own lives, he is able to show us the glaciers they skied on in their youth - the 1950s, that have now become little more than heaps of rock and scree. Indeed, if you hadn't seen the films or photographs in their archive then you might never have known there had been a glacier there in the first place. It's this very visual contemporaneousness that proves the point he is trying to make in real-time terms. There is a line in his commentary that points out that events that took millennia to establish themselves are now being undone in the space of one single human lifetime. Indeed the prognosis for Iceland might well be that in the not too distant future, it might have to change it's name. It's a bit on the long side, but with some stunning volcanic photography mixed into this affecting family story, this is a most human take on the effects of climate change that allows us to watch this destruction as it actually happened and is happening.