“It’s a direction for humanity,” says architect Mike Reynolds as he recycles bottles, beer cans and tyres into self-sustainable homes. Thankfully short on eco guilt trips, Oliver Hodge’s doc follows this maverick as he battles the red tape that entangles his regulation-flouting designs in New Mexico before decamping to tsunami-ravaged India, where his innovative shelters can save lives. Despite being more structurally flawed than one of Reynolds’ ‘Earthships’ and scarcely delivering on its promise of drama, this is a breezy watch. Reynolds comes off as a cuddly, eccentric, if slightly apocalyptic, Womble and blustering bureaucrats – one Republican dismisses Global Warming as a myth – make it easy to cheer him on. Inspiring rather than inspired, maybe, but its charms are hard to resist.