The Documentary Podcast

Air Pollution is responsible for around seven million deaths every year. Governments around the world have been trying to tackle it with a variety of measures. But now, the fight against air pollution is increasingly catching the imagination of artists and designers. In Al Hudayriyat Island in Abu Dhabi, a 7m high installation, Smog Free Tower by Dutch Studio Roosegaarde, bills itself as "the world's first smog vacuum cleaner." It purifies 30,000 cubic metres of air per hour and the dirt filtered from this urban smog is compressed into jewellery - Smog Free Ring - and sold to finance the project. In Delhi and Bangalore, AIR INK is "turning air pollution into ink solution" by capturing the black particles that float in the atmosphere and turning them into ink. Founder Anirudh Sharma and his co-founder Nikhil Kaushik, say taking air pollution and turning it into ink means the more AIR INK on your page, the less pollution in your lungs.

The so-called ‘parents’ revolution’ is happening in America - and it’s a revolt against the public education system. School choice campaigns are gaining ground across the country, fighting for tax-funded vouchers giving parents the opportunity to select their preferred school. More and more families are ditching institutions altogether, with homeschooling reportedly the fastest growing form of education in the US. Why are families turning away from traditional schooling, and what does this mean for the future of America’s education system? Alex Last travels to Arizona - a state at the forefront of the school choice movement - to find out more.

The Norwegian artist Edvard Munch is best known for his expressionist painting The Scream. A pastel version of it fetched $ 120 million when it was last auctioned in 2012, making it the most expensive piece of art ever sold at an auction. The art exhibition Edvard Munch: Trembling, shifts the focus to his landscape paintings, revealing a very different side of the artist and showing the vivid colours he used. Presenting this exhibition on both sides of the Atlantic - in the US, then in Germany and Norway - makes the show open up to a wider audience. But what does it take for an exhibition to go on a journey? The Museum Barberini in Potsdam, Germany grants the BBC exclusive access to witness what happens behind closed doors, when art works worth millions move across countries.

The US is home to around seven million undocumented migrants from central and south America. Many have been in the US for years, providing a vital workforce for many sectors of the US economy. But they have no health cover, or workplace benefits and many live under the constant threat of deportation back home. As Americans prepare for another presidential race where immigration is likely to figure high again on the agenda, Mike Lanchin travels to the state of Maryland, to hear about the lives of some of its large undocumented Latino population. He speaks to Maria who gets up at 5am for work, but has no holiday or sick pay. He meets Delmi, who has been using false papers to get work, and Toño who came to the US as an unaccompanied minor but now has a temporary work permit.

According to the UN, from 2008-2018 over 18,000 Vietnamese citizens a year married foreigners. The vast majority of them are women, and many find their foreign husbands through special matchmaking agencies. Thuong Le from BBC Vietnamese has been looking into this profitable and controversial business.

Produced by Caroline Ferguson, Hannah Dean and Alice Gioia.

(Photo: Faranak Amidi. Credit: Tricia Yourkevich.)

After weeks of student-led demonstrations and violence across Bangladesh, which caused the deaths of hundreds of people, Prime Minister Sheikh Hasina has fled to India and resigned after 15 years of controversial rule. Many of those left behind are celebrating what they are describing as a second independence. The man brought in to temporarily lead the country – the Nobel Peace Prize laureate Muhammad Yunus – has called on young people to help rebuild the South Asian country. Generation Z, who are mostly in their teens and 20s, have played a large role in forcing political change. Hosts Luke Jones and James Reynolds bring some of those young voices together to hear their thoughts and hopes for the future.

New digital technologies including AI have started to find a place in the grieving process, sometimes alongside more traditional religious rituals. 'Grief tech' concepts are springing up across the world, aiming to mask the finality of death for those left behind. Nkem Ifejika, who lost his mother three years ago, samples some grief tech products. He meets Stephen Smith, creator of StoryFile, a system which enables him to interact with his late mother almost as if he was interviewing her on video in the here and now. He talks to Japanese media artist Etsuko Ichihara, who has developed a robot that mirrors the physical personality, speech and gestures of a person who has died. And Nkem hears from Justin Harrison, who has been working on recreating the essence of his late mother’s personality.

A bonus episode from The Global Jigsaw looks at how the Taliban's return to power in Afghanistan has led to the erasure of women from public life. There’s a UN-led campaign to recognise it as “gender apartheid”, but the international community is divided and lacking leverage. Three years after the group took the capital Kabul, our experts explain what life is like for half of the population and why women have become a proxy for the nation’s image of itself.

Producer: Kriszta Satori, Elchin Suleymanov

The Global Jigsaw looks at the world through the lens of its media. Think of us as your media detectives, helping you get past the propaganda and misinformation. The Global Jigsaw comes from BBC Monitoring, which tracks, deciphers, and analyses news media in 100 languages. At BBC Monitoring, we don’t just speak the language, we understand the narrative. So we can help you untangle the context and single out rhetoric from reality, deception from truth. For more episodes just search The Global Jigsaw wherever you got this podcast.

This is a bonus episode for The Documentary of The Engineers: Intelligent Machines. This year, we speak to a panel of three engineers at the forefront of the 'Machine Learning: AI' revolution with an enthusiastic live audience.

Intelligent machines are remaking our world. The speed of their improvement is accelerating fast and every day there are more things they can do better than us. There are risks, but the opportunities for human society are enormous.

‘Machine Learning: AI’ is the technological revolution of our era. Three engineers at the forefront of that revolution come to London to join Caroline Steel and a public audience at the Great Hall of Imperial College:

Regina Barzilay from MIT created a major breakthrough in detecting early stage breast cancer. She also led the team that used machine learning to discover Halicin, the first new antibiotic in 30 years.

David Silver is Principal Scientist at Google DeepMind. He led the AlphaGo team that built the AI to defeat the world’s best human player of Go.

Paolo Pirjanian founded Embodied, and is a pioneer in developing emotionally intelligent robots to aid child development.

Producer: Charlie Taylor (Image: 3D hologram AI brain displayed by digital circuit and semiconductor. Credit: Yuichiro Chino/Getty Images)

A killer fungus is ravaging plantations of the Cavendish banana worldwide. It travels through the soil at lightning speed and chokes the banana plant so its leaves shrivel up and die. The disease is known as Tropical Race 4, or TR4 for short, and it has spread across the globe from Australia, to the Philippines, Pakistan and Mozambique. Now TR4 is widespread across Latin America. In Colombia where 30,000 people are employed in banana plantations, the government declared a state of national emergency when the fungus first arrived on farms in 2019. An international community of scientists is experimenting with different techniques to try to halt the spread of TR4 whether that's through gene-editing, selective breeding or injecting microbes into the soil.