Once You Know

After one of the hottest years on record, Sir David Attenborough looks at the science of climate change and potential solutions to this global threat....

Three decades on from the disaster, Chernobyl shows signs of life again.

In this detective story, filmmaker Cullen Hoback investigates the largest chemical drinking water contamination in a generation. But something is rott...

Climate justice! OHNE KEROSIN NACH BERLIN is a campaign by the Students for Future, which is part of the Fridays for Future movement. In 2020, 60 peop...

In this critical investigation into the most arresting victims of the climate emergency, biologist Ella Al-Shamahi joins a specialist autopsy into the...

A film about the importance of heirloom seeds to the agriculture of the world, focusing on seed keepers and activists from around the world.

Linger in Singapore's public housing and the first thing you will notice is the void deck. The empty space on the ground floor of HDB blocks brings pe...

Dr Helen Czerski delves into the Horizon archive to chart the transformation of a little-known theory into one of the greatest scientific undertakings...

This film explores how iconic Nevada Senator Harry Reid set the foundations for a green new deal.

Sheds light on an alternative approach to farming called “regenerative agriculture” that could balance our climate, replenish our vast water supplies,...

The Southern Sea Otter was historically abundant along the California coastline until intense hunting pressures reduced their numbers to near-extincti...

Sea otters are once again in peril after being brought back from the brink of extinction. An unprecedented number of sea otter deaths have occurred al...

Professor Iain Stewart and Professor Kathy Sykes take a timely look at global warming, exploring the world's leading climate scientists' vision of the...

In the same vein as Meri's other documentations, this one takes advantage of the glasnost policy to discuss the social and ecologic impact of the Rus...