Greenpeace launches one of its biggest ever expeditions – an almost year-long pole to pole voyage from the Arctic to the Antarctic – to highlight the many threats facing the oceans and to campaign for a Global Ocean Treaty covering all seas outside of national waters.

Visiting many of the areas identified as in need of protection by the groundbreaking academic study '30x30: A Blueprint for Ocean Protection', the 'Protect the Oceans' expedition will see scientists and campaigners team up to research the threats of climate change, overfishing, plastic pollution, deep sea mining and oil drilling.