Environmental photographer James Balog was a climate change sceptic before he started studying the melting of ice for himself.

He set up the Extreme Ice Survey – positioning cameras above glaciers and ice fields all over the world and leaving them to create a time-lapse over three years.

I never imagined you could see glaciers this big disappearing in such a short amount of time

The results were astounding. These glaciers were melting at a breathtaking rate – and might never come back.

It’s a visually stunning documentary that will get your brain working over how quickly climate change is altering our planet – for the worse.

Watch Chasing Ice on Netflix or iTunes