What in the World

From the Caribbean to the Mediterranean, tonnes of seaweed is turning up on beaches in ever bigger quantities. Seaweed blooms — massive, rapid accumulations of seaweed — are smelly and can release toxic gases. They’re also crowding out native plants. So where is all this seaweed coming from and is it down to climate change? BBC climate and science correspondent Georgina Rannard explains what effect this extra seaweed is having on biodiversity. Lots of countries and scientists are trying to work out what to do with all this seaweed - and even find ways to use it in the fight against climate change. We speak to Santiago Stebelski, who’s 20 and from Mexico. He and his brother have just founded a company called Sargolico, which aims to convert sargassum seaweed into bioplastic. Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Julia Ross-Roy, William Lee Adams and Adam Chowdhury Editor: Emily Horler

Football fans all around the world are gearing up for the 2026 Men’s World Cup. It’s set to be a historic tournament and will be hosted by three countries for the first time: the United States, Canada and Mexico. But some fans says it will make the history books for the wrong reasons - because of the jump in ticket prices.Group-stage tickets are up to three times more than those for the 2022 World Cup in Qatar and the cheapest ticket for the final will cost hundreds of dollars. FIFA has announced that it will release a small number of more affordable tickets, but some fans say this is not enough.BBC Africa Sports Reporter Celestine Karoney explains the costs of attending the 2026 World Cup - and how the tournament could also be affected by US‘ immigration policy. We also hear from fans in Cape Verde, which has qualified for the tournament for the first time, and in the Ivory Coast about the barriers they have faced when trying to get tickets to World Cup matches.Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Mora Morrison, Maria Clara Montoya and Chelsea Coates Editor: Verity Wilde

Are your work emails too polite? Do you use unnecessary punctuation and emojis? Career experts have told the BBC that using multiple exclamation marks can seem fake or could impact credibility.The BBC’s Culture reporter Yasmin Rufo has been looking at how the emails you write might be making you come across as less competent and less professional.Plus we’re joined by William Lee Adams who describes what it’s like communicating with people from all over the world at the BBC World Service and considering the email or message culture of different countries.Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Benita Barden and Adam Chowdhury Editor: Verity Wilde

At the end of November, Ethiopia’s biggest social media creators gathered in Addis Ababa for the Ethiopia Creative Awards. It was supposed to be a night celebrating the thriving digital culture but the outfits of the attendees stole the spotlight. A few weeks later six creators were arrested and detained for wearing “indecent attire” at the event and undermining public morality - but what exactly does that mean?Kalkidan Yibeltal, a BBC journalist based in Nairobi, tells us about cultural expectations for clothing in Ethiopia and why the outfits sparked so much controversy there. Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Benita Barden, Chelsea Coates and Julia Ross-Roy Editor: Verity Wilde

Iran is facing its worst drought in decades, with rainfall hitting a record low. Several of the reservoirs that supply water to the capital Tehran are almost empty: one of them, the Latian Dam, is currently holding less than 10% of its capacity. The government is encouraging people in Tehran to use less water and putting heavy restrictions on water supplies, especially at night.But Iran’s president, Masoud Pezeshkian, has also suggested another solution - relocating the capital.BBC journalist Ghoncheh Habibiazad outlines these plans and explains what other solutions Iran is using to tackle the problem. We hear from someone living in Tehran about what it’s like living with extreme water shortages. And the BBC’s climate and science correspondent Georgina Rannard explains how climate change is contributing to this drought - and what solutions Iran could use to mitigate water shortages.Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Julia Ross-Roy and Chelsea Coates Editor: Verity Wilde