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This week, world leaders are gathered in Lisbon, Portugal, for the United Nations Ocean Conference. A political declaration is an expected outcome.

The conference comes at what experts call a critical time for the world’s ocean, which is labouring under the weight of the climate crisis, rampant pollution and biodiversity loss.

We sat down with Leticia Carvalho, Principal Coordinator of the Marine and Freshwater Branch at the United Nations Environment Programme (UNEP), to discuss what must be done to safeguard the world’s seas.