Steve Backshall, Chris Packham and Ella Al-Shamahi visit the Maldives, Iceland and Cambodia, charting the fight to save the planet’s most endangered ecosystems.

Liz Bonnin, Gordon Buchanan and Ade Adepitan visit endangered ecosystems in California, Brazil and Kenya to see how people are attempting to rebalance local habitats.

In the second year of a seven-year project, six presenters chart the fight to save the planet’s endangered ecosystems. In this episode, we visit the Maldives, USA and Greenland.

In the second year of a seven-year project, six presenters chart the fight to save the planet’s endangered ecosystems. In this episode, we visit Brazil, Cambodia and Kenya.

As part of a seven-year series on the planet's most threatened ecosystems, this third episode takes an in-depth look at efforts to save coral reefs.