Why you can trust GamesRadar+ Our experts review games, movies and tech over countless hours, so you can choose the best for you. Find out more about our reviews policy.

There can't be many people still resistant to the inconvenient truth of climate change.

But any that are should be made to see Jeff Orlowski’s eco-doc, which charts the efforts of National Geographic photographer James Balog to film time-lapse imagery of glacial retreat.

As this heroic campaigner battles harsh conditions and a bum knee to install 30 cameras across three continents, some may ask whether it’s worth the trouble.

Latest Videos From

Watch full video here:

They’ll soon be silenced by the jaw-dropping results: visually spectacular montages of ice floes receding that will make you gasp and move you to tears.

Neil Smith is a freelance film critic and writer who contributes regularly to Heat, SFX and Screen International. He's a long-time member of the London Film Critics’ Circle and was a contributing editor at Total Film for many years.