Seagrass meadows are a hugely important store of blue carbon - and so is the rest of the ocean sea floor Philip Schubert/Shutterstock “The science we need for the ocean we want” – this is the tagline for the UN Ocean Decade (2021-2030), which has just held its first conference in Barcelona , Spain. Marine scientists from around the world, including me, gathered alongside global leaders to chart the progress of this ten-year mission to improve ocean health and marine biodiversity. That includes