The secretive Wagner Group has a history of violence in Africa. In this episode, we ask why leaders are outsourcing security to an unaccountable army accused of murders, rapes and torture. We look into the crimes they're accused of committing, the governments they're keeping in power and the business deals making it all possible.

Aanu Adeoye, an Africa expert at London's Royal Institute of International Affairs, tells us about the propaganda machine behind Wagner. Keir Giles, a Russia specialist at Chatham House, explains just how intertwined the group is with the Russian state, and Dr Sorcha MacLeod, chair of the UN Working Group on the use of mercenaries, explains why the presence of groups like Wagner in unstable countries often makes things worse.

Presenter: David Reid Editor: Carmel O'Grady

Audio for this episode was updated on 31 March 2022.

(Photo: Protesters in Mali's capital, Bamako, waved Russian flags during an anti-France demonstration in May 2021. Credit: AFP/Getty Images)

Aboriginal people from Australia's Tiwi Islands have joined forces with marine scientists and other environmentalists in the fight against a new gas field planned for the Timor Sea. Vivienne Nunis reports on the multi-billion dollar Barossa gas development, which has already been partially approved by Australian regulators. The oil and gas giant Santos plans to build a 300km gas pipeline from the gas field to Darwin, through a marine park that is home to turtles, sponges and other sea creatures. Experts describe the tropical waters as 'pristine'. So who will win out? The oil and gas industry or those fighting against the wells, rigs and drills? Image: an Olive Ridley sea turtle, the most common species nesting on the Tiwi Islands. Credit: Getty

Drones, which were originally developed by the military, are now being used all over the world for humanitarian purposes. Shamim Nabuuma Kaliisa, the founder of CHIL-AI, tells Jo Critcher how she was inspired by her own experience of cancer to use drones to give more women in Uganda access to screening.

In Sweden, the CEO of Everdrone, Mats Sällström, describes how drones are being used to quickly transport life-saving equipment to emergency situations.

There are more challenges to using drones in smaller, more densely populated countries like the UK but Elliot Parnham, the CEO of the drone operator Skyfarer, says he believes they can be overcome. His company is starting a pilot scheme to help the NHS transport critical medical supplies.

Presenter/Producer: Jo Critcher

(Photo: PWOne drone; Credit: Skyfarer Ltd.)

AI, data analytics and automated surveillance are ever more shaping refugees' futures around the world. From the external borders of the EU to the US-Mexico border, "smart border" solutions, developed by private companies for states, are being used to surveil and control people on the move. Lawyer and anthropologist Petra Molnar tells the BBC's Frey Lindsay how she's seen these technologies creep into borders and camps around the world, and Dr Emre Eren Korkmaz of Oxford University describes how this global "border industrial complex" has become hugely profitable for private companies. We'll also hear from a new high-tech refugee camp on the Greek island of Samos, where refugees feel oppressed and dehumanised by the litany of technology that surrounds them. Sae Bosco, of Samos Volunteers, explains that these technologies don't do much to protect people within the camp, despite the EU's claims. And Sarah Chander of European Digital Rights tells Frey that the EU appear aware of the harms algorithmic surveillance and control can bring to people, and so is moving to protect EU citizens, but not migrants.

(Picture: the Samos CCAC refugee camp. Picture credit: Getty Images)

Global fertiliser prices are reaching record highs, as supplies from Russia, one of the world’s largest exporters dry up. As the war in Ukraine intensifies there are warnings of food shortages as farmers struggle to get hold of fertilisers and starting to rationing its use.

Soybean farmer Karl Milla tells Sam Fenwick he is rationing how much fertiliser he uses. He says he is worried what effect that will have on crop sizes later in the year. Laura Cross from the International Fertiliser Association explains why government sanctions on Belarus and countries like China, Turkey and Egypt restricting exports have contributed to soaring fertiliser prices. And German pig farmer, Dirk Andresen tells us he cannot afford to buy enough food to feed his pigs.

Presenter/producer : Sam Fenwick (Photo: Karl Milla with kind permission)

Climate change and disasters continue to threaten peoples’ livelihoods and wellbeing in the Pacific Islands.

Jon Naupa, a Kava farmer in Vanuatu, tells the BBC’s Frey Lindsay how difficult it’s getting to break even at the moment. In response to the challenges, young Pacific Islanders are taking advantage of regional labour mobility schemes to make money and help their families. Australia's Pacific labour mobility schemes have seen tens of thousands of Pacific Islanders filling job shortages in Australia, particularly in the agriculture sector.

Telusa Tu'i'onetoa, a PhD candidate at Australian National University, explains how the schemes are supposed to work, and the impact the separation has on families. We’ll also hear from Fiona, a young mother of two working in South Australia. While the schemes offer the chance to earn money at a time when opportunities are limited at home, they are also areas with high risk of exploitation and abuse of vulnerable workers. Tukini Tavui, the CEO of the Pacific Islands Council of South Australia, tells Frey how they work to help protect workers, and what he’d like to see done to help workers break the cycle of wage dependency.

(Picture: Samoans picking fruit in Australia; Credit: Getty Images)

ESG funds - which claim to promote environmental, social and corporate governance best practice - are all the rage. But are investors being taken for an expensive ride?

Ed Butler speaks to one man with his doubts - Tariq Fancy, who used to be in charge of sustainability investing at BlackRock, the gigantic fund management firm, whose boss Larry Fink is an advocate for the role that big finance can play in accelerating the transition away from fossil fuels.

Today investors are faced with a confusing menagerie of products that purport to be climate-friendly, as described by Dylan Tanner of the lobbying research firm InfluenceMap. In reality, many of them charge high fees for some pretty questionable environmental benefits. But if investors feel misled, could they find legal recourse in the form of a class action lawsuit? Ed asks Fiona Huntriss of the UK law firm Pallas Partners.

Producer: Victoria Broadbent

(Photo: $100 bill covered in green paint; Credit: Getty Images)

Two young women recall how they fled the Russian invasion of their homeland, and discuss their hopes and dreams for the future.

Alexandra from Kyiv tells Tamasin Ford how she had to say goodbye to her parents at the packed Polish border, and now suffers survivor's guilt, living in the safety of Berlin. Meanwhile Elena recalls the first explosions of the war, and describes how she now finds herself the sole breadwinner for her family, living in exile in Warsaw.

Producers: Sarah Treanor and Tom Kavanagh

(Picture: Refugees from Ukraine at the Medyka border crossing with Poland; Credit: Louisa Gouliamaki/AFP via Getty Images)

Despite the quotas and positive discrimination, many black Brazilian professionals still struggle to feel accepted and get promoted.

Ivana Davidovic hears from Luiza Trajano - Brazil’s richest woman and the owner of the country’s largest retailer, Magazine Luiza - who explains why she decided to launch a coveted management trainee scheme for black people only. Former model and director of the Identities of Brazil Institute NGO, Luana Genot, talks about her own experiences of being held back because of the colour of her skin and her work helping companies change their culture around black staff.

Alabe Nujara recalls being the first in his family to go to university and feeling out of place as a black man, which inspired him to successfully campaign for the introduction of quotas for historically disadvantaged students at federal institutions. Plus Brazilian sociologist Graziella Moraes Silva discusses why Brazil has an image of a racially inclusive society, which many black people would not recognise as their reality.

(Picture: Worried young businesswoman in office corridor in Brazil; Credit: Getty Images)

People across Europe are opening up their homes and businesses to Ukrainians as the refugee crisis tops 3 million. Ivanka, a Ukrainian social worker who has fled to Poland, tells us about the generosity of hotelier Dorota Baranska, who is now housing her and hundreds of other refugees in her hotels. And Eugen Comandent, COO of Purcari Wineries in Moldova, explains why his company has transformed its estate into a refugee centre. Matthew Saltmarsh from the UN’s refugee agency says this is Europe’s worst refugee crisis since World War Two and that generous countries on Ukraine’s border are starting to run out of resources. But some people based farther west are trying to create virtual ways to help. Ivan Kychatyi, a Ukrainian based in Berlin, has created the job portal UAtalents.com to that helps Ukrainians who are internally displaced or who have fled the country to find a job. And in Amsterdam, Guido Baratta has set up Designers United for Ukraine, specifically to help Ukrainians in the creative industries find work. This programme is presented by Tamasin Ford and produced by Sarah Hawkins and Tom Kavanagh

(Photograph: Women distribute food and hot drinks at a Moldovan winery close to the Ukrainian border, Credit: Purcari Wineries)

Climate change and disasters continue to imperil the livelihoods and well-being of people in the Pacific Islands.

This is the most pressing issue facing the Pacific today, Ofa Ma'asi-Kaisamy, manager at the Pacific Climate Change Centre, tells the BBC’s Frey Lindsay. And Dr Salanieta Saketa, senior epidemiologist at the Pacific Community's Public Health Division, explains how such events seriously impact people’s health.

We also hear how people are fighting to build resilience and forge new futures. Lusia Latu-Jones, director of Tonga Youth Employment and Entrepreneurship, tells Frey how young Pacific Islanders are creating their own opportunities. And Flora Vano of ActionAid Vanuatu explains how a women-led collective works to help each other prepare for and withstand the challenges they face.

(Photo: High-tide flooding on Majuro Atoll in the Marshall Islands, December 2021; Credit: Giff Johnson/AFP/Getty Images)

What now for Chelsea FC? After the UK government imposed sanctions on Russian owner Roman Abramovich, the club has been denied access to the funds that enabled investment in some of the world's best players and helped it become one of the biggest clubs in European football. No income, either, from ticket or merchandise sales can be made by the club, throwing its short term future into doubt. It's unclear whether Chelsea can even pay its squad and staff next month, such is the punishing nature of the sanctions put upon Mr Abramovich over his ties to the Kremlin and Vladimir Putin in the wake of Russia's invasion of Ukraine. So how will this play out on and off the pitch? We speak to Kieran Maguire who lectures in football finance at the Liverpool University; Justine Walker, an anti-money-laundering compliance specialist based in the UK; Jai McIntosh, a sports writer and Chelsea fan and former Chelsea player Pat Nevin. The programme is presented by Ed Butler and is produced by Elizabeth Hotson and Russell Newlove.

Picture: Chelsea FC's crest Credit:PA