What in the World

For some women, the two-week luteal phase of their menstrual cycle can be extremely disruptive and life altering. PMDD or Premenstrual Dysphoric Disorder is mental health disorder directly linked to regular hormonal fluctuations that take place during a cycle. People living with PMDD can experience anger, anxiety, severe depression, and even suicidal thoughts which then stops shortly after menstruation begins. Two women, Shariya in the US and Janna in Germany tell us how PMDD has impacted them.There’s very little scientific research about why PMDD happens and the signs or symptoms can be missed by doctors. We hear from BBC Health Reporter Ruth Clegg, who’s been reporting on how social media has shifted perceptions of the disorder, and led to changes around how doctors screen for symptoms. If you are affected by any of the issues in this episode, or suffering distress or despair and need support, you could speak to a health professional, or an organisation that offers support. Details of help available in many countries can be found at Befrienders Worldwide. www.befrienders.org Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Benita Barden, Ash Mohamed and Adam Chowdhury Video Journalist: Baldeep Chahal Editor: Verity Wilde

For decades, mangrove forests were disappearing at an alarming rate. Now, new satellite data reveals a hopeful shift. After years of decline, these vital coastal ecosystems are making a comeback. In this episode, BBC environment correspondent Matt McGrath explains what mangrove forests are, why they suffered such significant losses from the 1980s through the 2010s and how advances in technology are allowing scientists to track their recovery from space. We also examine why mangroves are one of nature’s most powerful tools for protecting coastlines, storing carbon and helping communities adapt to climate change.Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: William Lee Adams and Benita Barden Video producer: Baldeep Chahal Editor: Verity Wilde

Smart glasses are big business, Meta, one of the leading manufacturers of the glasses say that last year they sold seven million pairs globally. But new designs that resemble regular sunglasses or reading frames mean they can be difficult to spot. Users can make phone calls, follow maps, and use AI assistants completely hands free. They can also use the built in camera to take photos and record videos subtly - this is part of the controversy. There have been cases of people being filmed secretly and posted online without their consent. So how many people are buying smart glasses and how significant is the risk to privacy? BBC technology reporter Laura Cress tells us about the tech that goes into smart glasses and investigative reporter Georgia Poncia talks us through the concerns. Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Iqra Farooq Producer: Benita Barden and Emma-Louise Amanshia Editor: Verity Wilde

People in South Korea have been smashing their Starbucks mugs with hammers, a CEO has been fired and there have been protests on the streets, but why? Starbucks is the number one coffee chain in South Korea with over 2000 branches. Recently they launched a marketing campaign for a new reusable tumbler "SS Tank" and they've faced huge backlash. The release was on the same day as the anniversary of the 1980 Gwangju Uprising, a sad day in the history of the country which left more than a 200 people dead.So what impact have the boycotts had? And what happens next? Jake Kwon the BBC's Seoul correspondent tells us about the Tank Day promotion, the financial implications and the wider context of the upset this has caused. We also hear from young people in South Korea on what they think about the boycott.Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: William Lee Adams Producer: Benita Barden and Emma-Louise Amanshia Editor: Verity Wilde

This year’s Fifa World Cup is the biggest yet. The football tournament is being co-hosted by Mexico, Canada and the United States and has a record 48 teams taking part. Four of those teams have qualified for the first time ever: Cape Verde, Curaçao, Jordan and Uzbekistan. In this episode, we get familiar with the debuting nations on and off the pitch with some of our BBC reporters, including Paul Njie, a senior journalist at BBC Africa, and Husam Assal, a BBC reporter in Amman. Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Iqra Farooq Producers: William Lee Adams, Benita Barden and Julia Ross-Roy Editor: Verity Wilde

According to the World Health Organization, around 1 in 5 people will develop cancer during the course of their lifetimes. We usually associate the disease with getting older - but doctors are warning that some cancers are becoming more common in people in their 20s and 30s too. Data shows that bowel and breast cancer are the most common cancers for young adults, with others such as thyroid and ovarian cancer on the rise too. So, what’s behind this?BBC Health and Science correspondent James Gallagher explains why we are seeing more young people being diagnosed with cancer - and the new treatments scientists are finding to combat the disease. We also hear from Lauren McDermott in Canada, who was diagnosed with breast cancer at 22. She shares her story and tells us why she is encouraging other young people to advocate for their health if they are showing symptoms.Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producer: Emily Horler, Chelsea Coates and Ash Mohamed Editor: Verity Wilde

The war in Iran is doing something years of climate summits haven’t managed to - pushing some countries towards renewable energy, fast.That’s because ships passing through the Strait of Hormuz have been pretty much blocked for months, since the war began. Thousands of oil tankers are stranded near the Strait, which is one of the world’s most important channels.And it’s particularly affecting Asia. The majority of the crude oil passing through the Strait is headed to Asian markets. Energy prices there are soaring and there are fears of shortages and blackouts across the region. Shawn Yuan from the BBC’s Global China Unit takes us through how some countries are accelerating their search for alternative energy sources.Plus, we hear from Tri Wahyuni, from BBC News Indonesian and BBC reporter Thuong Le who tells us how Vietnam is coping.Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Emily Horler and Benita Barden Video producer: Tim Hodges Editor: Verity Wilde

Tourism is a vital part of the economy for many Caribbean nations, from Jamaica to Grenada to the Bahamas. In fact, the United Nations says the Caribbean is the region of the world that’s most dependent on tourists. The sector supports millions of jobs — from barmen and waiters to cab drivers and chefs — and many of these roles go to women and young people. But what happens when developers close off beaches to locals? BBC reporter Chelsea Coates, who has visited several Caribbean islands, explains the growing tensions across the region as countries try to balance tourism with the rights and interests of local communities. Focusing on Barbuda, a tiny island with just a few thousand residents, she looks at the impact of major developments and how local residents are reacting.Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: William Lee Adams, Deedee Kyeremateng and Benita Barden Editor: Julia Ross-Roy