COP21: What does ocean acidification look like?

Marine scientists are concerned that changes in the chemistry of the world's seas will have severe consequences for marine wildlife and ecosystems.

Jason Hall-Spencer, professor of Marine Biology at Plymouth University, shows BBC environment correspondent Matt McGrath the potential impact through two experiments at London's Aquarium.

Produced by Marcus Thompson (BBC)

COP21: Vanuatu voices from disappearing islands

Vanuatu is on the front line in the climate change debate, with rising sea levels putting the very future of the low-lying archipelago in jeopardy.

Islanders hope some sort of deal can be reached at the climate change conference Paris to make sure that whatever happens, their home will be as well prepared as possible.

They raised their concerns with the BBC's Matthew Price. (BBC Science/Environment)