Climate change: What is coral bleaching?

Coral reefs are vital for lots of plants, animals, and people, but warming oceans can lead to coral bleaching which seriously damages the delicate ecosystem.

Stressful events caused by climate change - like storms, cyclones, floods, and warming seas - have a harmful impact on coral and are happening with increasing frequency and intensity across the world.

But what is coral and why is it so important? Watch this to find out.