Nitrous oxide or laughing gas as been used as a recreational and medical drug since the late 1700s. Dentists often use it as an anaesthetic. It’s been linked to hippie, festival and rave culture for decades. And in the last few years, American rappers like Kanye West, Young Thug and Gunna have been open about using it.

You might have seen the little metal cannisters, that people use to dispense the drug, littering the streets. But now, manufacturers of nitrous oxide are producing bigger cannisters with different flavours and bright packaging and in the US, they are being stocked in smoke and vape shops.

Experts say this is contributing to a rise in the drug’s misuse. Using nitrous oxide can have harmful effects. Inhalation of nitrous oxide can lead to hypoxia, where the brain does not get enough oxygen. This can result in death. Regular inhalation can also lead to a Vitamin B12 deficiency which can cause nerve damage, degradation of the spinal column and even paralysis. The number of deaths attributed to nitrous oxide poisonings rose by more than 110% between 2019 and 2023, according to the American Center for Disease Control and Prevention.

In this episode BBC journalist Eve Webster explains how the use of nitrous oxide has changed recently, especially in the US. We hear about the risks of using it and where bans are in place. Ezra Marcus, an American investigative journalist, tells us how nitrous has become so popular in the US since the pandemic - and its links to American rappers. And BBC journalist Chigozie Ohaka sets out the current situation with nitrous oxide in Nigeria, where authorities tried to clamp down on it in 2023.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Julia Ross-Roy and Chelsea Coates Video Journalist: Baldeep Chahal Editor: Verity Wilde

Whether you’re struggling to write an email, planning a holiday, or wondering what to cook for dinner: increasingly more and more of us are turning to AI for the answer. But some experts have raised concerns that people are becoming too reliant on the new technology - and that this will have implications for how we learn and communicate with each other offline. So what’s the best way to use AI, and what alternatives are out there?

Our BBC Tech reporter, Liv McMahon, debunks some of the myths around AI chat bots and talks us through what you should consider when using them regularly. And Antonio Weiss, an AI & Digital Expert, shares his top tips for how to get the most out of your AI chatbot.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Benita Barden, Emily Horler and Chelsea Coates Editor: Verity Wilde

The K-pop industry is known for being super strict and encouraging idols not to share details about their private lives, especially their relationships. For LGBTQ idols, there’s an added layer of pressure, where they can’t reveal or talk about their sexuality at all, due to the stigma associated with homosexuality in South Korea. The country is deeply divided over LGBTQ acceptance.

So what happens if you do mention your sexuality as a K-pop idol? BBC Korean’s Juna Moon has been talking to Bain from the boyband JUST B, who came out as gay on stage during a show in Los Angeles earlier this year. We hear some of her interview with Bain, who talks about his fans’ reactions. And Juna explains why it’s so unusual for K-pop idols to disclose their sexual identity.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Julia-Ross Roy and Benita Barden Editor: Verity Wilde

Climate change is one of the biggest issues of our time. Warmer weather and melting ice is forcing people and animals to migrate but it’s also threatening traditions.

Myths, dances and national dishes - we’ve all got distinctive, defining customs that we would never want to lose. So what are people across the world doing to keep hold of their identities?

BBC journalist Abiona Boja explains how cultural heritage loss is affecting young people across the globe. We hear from Muntadhar Abdul Ali about the droughts in Iraq’s marshes. And Maya Natuk tells us how rising temperatures in Greenland are affecting people’s sense of identity there. They explain the actions they’re taking to save their cultural traditions from extinction.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Abiona Boja, Benita Barden and Julia Ross-Roy Video Journalist: Baldeep Chahal Editor: Verity Wilde

Ed Sheeran’s long-running copyright battle over his hit Thinking Out Loud is finally over. That’s after the US Supreme Court rejected an appeal to revive the copyright trial. It all started back in 2016 when Sheeran and his co-writer Amy Wadge were sued for allegedly copying Marvin Gaye’s 1973 classic Let’s Get It On. Sheeran, whose subsequent hits include Azizam and Shape of You, ended up winning that case, with the judge saying that lots of songs share similar elements and that Gaye’s chord progressions couldn’t be copyrighted. But the family of Ed Townsend, who co-wrote the song with Gaye, appealed the case, and it dragged on for nearly ten years.

BBC music correspondent Mark Savage breaks down the case and gives a quick rundown of how copyright law works in music. He also discusses other famous plagiarism allegations and the rules around sampling music to create new songs.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: William Lee Adams, Emilia Jansson, Benita Barden Editor: Verity Wilde

There is a small but growing group of people in the US who are concerned that civilisation might collapse if people don’t have enough children. They’re called pro-natalists, and they argue that less children will lead to fewer workers and smaller economies, leading to an eventual collapse. Their solution: to save humanity people simply need to have kids. High-profile supporters of the movement include tech bros like Elon Musk and Donald Trump.

The BBC’s population correspondent Stephanie Hegarty tell us more about the movement and how it came about. We are also introduced to the Collins family, one of the leading pro-natalist families who want to have as many children as they can.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: William Lee Adams Producer: Mora Morrison Video Journalist: Baldeep Chahal Editor: Verity Wilde

Israel has launched a huge wave of attacks on Iran. They say the targets of their attacks are Iran’s nuclear facilities and important scientists. Iran has claimed it is not developing any weapons, yet several secret nuclear sites have been uncovered in the past. Iran has responded with drones and missiles. So is Iran developing nuclear weapons? Ghoncheh Habibiazad from the BBC Persian team talks us through Iran’s history with nuclear weapons. She also gives us an insight into what the reaction on-the-ground in Iran has been like since the attacks started.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: William Lee Adams, Julia Ross-Roy, Emilia Jansson Editor: Verity Wilde

Punjabi rapper Sidhu Moose Wala was at the peak of his fame when he was murdered in 2022. Goldy Brar, a gangster based in Canada, has said that he ordered the killing. But how did one of India’s most popular musical acts become the target of a feared gang?

Investigative journalist Ishleen Kaur has spoken to Brar about the murder and his motivations, which she explores in the BBC Eye documentary “The Killing Call.” Ishleen tells us about Moose Wala’s musical origins and his rise to fame. She also explains what his killers stood to gain by killing him.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: William Lee Adams, Chelsea Coates Editor: Verity Wilde

More money, more growth, more stuff. Can our economies keep on growing forever? And should they? A group of activists and academics are questioning the possibility of endless economic growth on a finite planet and are advocating for a bold solution: degrowth.

The movement argues for a 'democratisation of the economy' and for collectively managing key resources, like housing. This, they argue, would also help us to live more sustainably - and help in the fight against climate change. But critics argue that opposing economic growth is impractical and warn of negative consequences, especially for the most vulnerable.

BBC journalist Alvaro Alvarez has been reporting on this. He joins us to explain the pros and cons of the theory. We also hear from Oxford university professor Sam Fankhauser, and a TikToker in New Zealand who’s living her off-grid dream.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: William Lee Adams Producers: Mora Morrison and Emily Horler Video Journalists: Kesewaa Browne and Baldeep Chahal Editor: Julia Ross-Roy

Dog walking has been banned in at least 20 cities across Iran, after it was first outlawed in the capital, Tehran, six years ago. It’s the latest restriction to come from the authorities, who argue that dogs are ‘unclean’ and see having pets as a sign of growing Western influence.

Despite this, dog ownership has risen in the country in recent years and many owners have started walking their dogs in secluded areas at night to evade detection. Ghoncheh Habibiazad, from the BBC Persian team, explains why the ban has been introduced and how people are defying the strict policies set by the Iranian regime.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Mora Morrison, Chelsea Coates and Emily Horler Editor: Verity Wilde

‘High’ or ‘added’ protein foods are popping up everywhere - from ice cream to pizza and even coffee. The nutrient’s newfound popularity has a lot to do with the fact that it helps our bodies repair and build up muscle. But could these new snacks come with hidden health risks? And are there other nutrients, like fibre, we should be paying more attention to?

BBC journalist Chelsea Coates talks us through why high-protein foods are on the rise and explains how much protein we need to stay fit. Plus, Cara Harbstreet, the dietician behind the YouTube channel Street Smart Nutrition, shares her tips for how you can get enough protein in your diet.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Benita Barden and Chelsea Coates Video Journalist: Baldeep Chahal Editor: Verity Wilde

For millions of Moroccans, Eid al-Adha means quality time with your family, eating delicious food - and the tradition of sacrificing sheep. But this year, the king of Morocco, Mohammed VI, has banned the practice because of a seven-year drought in the country. Dry pastures have meant that the number of sheep herds has dropped sharply, while the cost of meat rises. King Mohammed says the ban is necessary to prevent “significant harm” to families struggling with high prices - but not all Moroccans are happy with the restriction of their religious practices.

Basma El Atti, a Moroccan journalist based in Rabat, explains why Eid al-Adha is such an important festival and talks us through the reasons for the ban. And BBC Monitoring journalist Samia Hosny tells us more about the long-lasting drought in the region and how it’s affecting daily life there. And we hear from young Moroccans celebrating Eid about what they think of the ban.

Instagram: @bbcwhatintheworld Email: [email protected] WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Chelsea Coates, Emilia Jansson, Rosabel Crean and Mora Morrison Editor: Emily Horler