Why seagrass is so important to our environment. Ade Adepitan takes a dive in the Maldives to swim in seagrass and learn about its properties.
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Yalda Hakim joined BBC World News in December 2012 as a presenter and correspondent.
Presenter of HARDtalk BBC World News' flagship current affairs interview programme
BBC's Chief International Correspondent and senior presenter for BBC World News
Lead anchor of BBC World News America