Guardian: Six ordinary people. One extraordinary feat of courage and endurance. Twenty thousand tonnes of carbon dioxide belched into the atmosphere in a single day. Twelve members of a jury, reaching a verdict that could change the future of the planet. From these ingredients, Nick Broomfield has fashioned a film that tells the gripping and (the description is unusually literal) life-changing story of the Kingsnorth Six. When a demonstration at the Kingsnorth power station in north-east Kent …