Matcha, a long-time popular drink in Japan, has gone global. Major chains now serve it, and coffee start-ups are competing to offer their own photogenic takes on the vivid green drink.

But the growing craze exposes bigger problems for the wider tea industry.

Tea is a delicate crop, highly sensitive to changing weather conditions. Around the world, farmers are reporting falling yields, altered growing seasons and a higher risk of disease due to climate change. Labour shortages and economic issues are also affecting supply chains, creating uncertainty for producers and consumers.

From drone technology helping to monitor remote fields to the extraordinary claim that tea could one day grow on the moon, scientists and growers are exploring bold new solutions.

Is trouble brewing for the worldwide tea industry?

Contributors

Presenter: Tanya Beckett

(Photo: Lady drinking tea. Credit: Redhead pictures/Getty Images)

In the aftermath of World War Two, the charter that founded the United Nations was signed, with the aim of preventing a third global conflict. The UN Security Council, one of six organs of the UN, has the primary responsibility for the maintenance of international peace and security. It’s made up of 15 member countries, there are 10 rotating non-permanent members who are elected for two-year terms by members of the UN General Assembly, the body that represents all UN members. And there are five permanent members – the US, the UK, France, China and Russia; it’s these five that have veto power.

Now 80 years on, there are growing calls for the council to reflect the world of today, not only in its representation, but in the way it functions. Criticisms of this international body include abuse of the veto power, lack of permanent representation for countries which have seen more than their fair share of conflict and an inability to reach common consensus, including on how to reform the organisation from within.

So, on The Inquiry this week we’re asking, ‘Is the UN Security Council still relevant?’

Contributors:

Presenter: Charmaine Cozier

(Photo: United Nations Security Council meeting. Credit: Reuters/BBC Images)

Benin has long tried to highlight its role in the transatlantic slave trade through monuments and memorials in the country, in the hope it would attract tourism.

Now it has a new plan.

It is offering citizenship to descendants of enslaved Africans around the world.

US singers Lauryn Hill and Ciara received their citizenship in July. Filmmaker Spike Lee and his wife Tonya Lewis Lee have also been made Benin’s ambassadors to the African-American population in America.

The move is an attempt to attract talent and money to its shores and showcase the nation’s culture and traditions to a wider audience.

This week on The Inquiry we’re asking: Can Benin win back its diaspora?

Contributors:

Presenter: Tanya Beckett

(Photo: Ciara receiving citizenship of Benin. Credit: Government of Benin)

At the beginning of September 2025, within 48 hours, Nepal’s government had been toppled, and more than 70 people had been killed, with many more injured. The trigger for all of this had been a government ban on 26 social media platforms, but the primary reasons ran much deeper. Nepal became a republic in 2008, following a decade long civil war, but since then, the promised stability and prosperity have failed to materialise. The country has been subjected to short term coalition governments, resembling a game of musical chairs between certain political parties.

Asia is increasingly witnessing a mood for change amongst its young people, from Indonesia to Sri Lanka and last year’s student-led revolution in Bangladesh. But very few protests of this nature have translated into fundamental social change. And it remains to be seen if the decision by Nepal’s Gen Z, to place their trust in 73-year-old Sushila Karki as the new Interim Prime Minister, reflects their own political maturity.

Contributors:

Presenter: Charmaine Cozier

(Photo: Anti government protest in Kathmandu. Credit: Sunil Pradhan/Anadolu via Getty Images)

Donald Trump once dismissed cryptocurrencies as a scam. But since returning to office, his view of them has shifted dramatically.

In July, President Trump signed new legislation aimed at integrating crypto into the financial mainstream. Members of the Trump family have launched their own ventures, generating significant profits and boosting the visibility of digital currencies in American politics.

Supporters say this could reassert the dominance of the US dollar in a changing global economy, while critics warn of economic volatility and regulatory gaps. How did crypto go from fringe to front-and-centre in Trump’s economic vision?

This week on The Inquiry, we’re asking: Is Trump building a crypto economy?

Contributors:

Presenter: Tanya Beckett

(Photo: President Donald Trump displays the GENIUS Act on 18 July 2025. Credit: Brendan Smialowski/Getty Images)

Lyme disease is a bacterial infection passed on to humans by infected ticks. Symptoms can range from fatigue, joint pain and a circular shaped rash to facial paralysis and heart arrythmia.

According to a British Medical Journal (BMJ) global health review, Lyme disease has likely infected about one in 10 people across the globe.

Recently, pop star Justin Timberlake went public about contracting the condition.

If treated quickly, most people will recover but there are still issues around diagnosing and treating Lyme disease.

And globally, cases are on the rise. In this edition of The Inquiry, Charmaine Cozier explores what's behind the increase and hears about new tests and vaccines currently being developed.

Contributors:

Presenter: Charmaine Cozier

(Photo: Tweezers removing a forest tick from human body. Credit: rbkomar/Getty Images)

The major rivers of the Rio Grande and the Colorado run through both the United States and Mexico and they are the source of a water sharing agreement between the two countries that dates back to 1944.

Under the terms of this treaty, Mexico must send 430 million cubic metres of water per year from the Rio Grande to the US, to supply Texas and dozens of cities near the border. Whilst the US sends a much larger allocation of nearly 1.85 billion cubic metres of water a year, from the Colorado River to supply Mexico’s border cities like Mexicali and Tijuana.

But 80 years on, a deepening row over a shortage of water has put the treaty in jeopardy. Mexico is in arrears and has failed to keep up with its water deliveries to the US for much of this century and its unlikely to meet its obligation this year too. Farmers on both sides are struggling to water their crops, whilst the border cities are facing water shortages for both their populations and industries. And pressure on Mexico is mounting with President Trump earlier this year accusing Mexico of ‘stealing’ the water.

So this week on The Inquiry, we’re asking ‘Why does Mexico owe the US water?’

Contributors:

Presenter: Gary O’Donoghue

{Photo: The Rio Grande River and surrounding land that divides the USA and Mexico. Credit: Daniel Slim/Getty Images)

Deepfakes are videos, picture or audio clips made with artificial intelligence to look real.

Although sometimes used for fun, they can also be used to defame or discredit people. Anyone from politicians to celebrities to normal members of the public can become the subject of deepfake imagery. So how can we protect our image from being used maliciously?

In Denmark, the government is proposing a new law which would give people copyright-like protection over their face, voice, and appearance. In this edition of the Inquiry, Tanya Beckett explores how the new law would work and asks how do we strike a balance between Big Tech and AI innovation and the need to protect our identity?

Contributors:

Gitte Løvgren Larsen, Lawyer and partner, Sirius Advocator, Denmark

Dr Alina Trapova, lecturer (Assistant Prof), Intellectual property law, University College London

Ignacio Cofone, Professor of Law and Regulation of AI, University of Oxford

Mikkel Flyverbom, Professor of Communication and Digital Transformations, Copenhagen Business School

Presenter: Tanya Beckett

In January, the popular Chinese social media app TikTok went offline for its 170 million Americans. The outage marked a turning point in a long-running dispute over data privacy and national security, with US lawmakers concerned about the app’s Chinese ownership. A law passed by Congress required ByteDance, TikTok’s parent company, to sell its US operations or face a ban.

Contributors:

Presenter: David Baker

(Photo: TikTok message announcing a ban. Credit: NurPhoto/Getty Images)

A far-right party which came to prominence during the Covid-19 pandemic recently showed itself to be a contender to Japan’s centrist political establishment, when it grew from one seat, three years ago to 15 seats in the recent elections.

Known as Sanseito, the party is led by Kamiya Sohei, whose YouTube videos spread conspiracy theories about vaccinations. Its political platform is a nationalist ‘Japanese first’ agenda and warns against a ‘silent invasion of foreigners’.

Whilst for Japan’s ruling Liberal Democratic Party coalition, the election results were bruising. The LDP lost its majority in the Upper House, having already lost control of the Lower House last year. But its embattled Prime Minister, Shigeru Ishiba, whilst facing calls from within his party to resign, has said he has no plans to quit.

Against this backdrop, there’s a growing unease amongst Japanese voters over issues like immigration, over-tourism and the economy and Sanseito are tapping into that.

Joining us to discuss Japan's political climate are Kenneth Mori McElwain, professor of Comparative Politics, University of Tokyo, Japan; Dr Fabian Schäfer, chair of Japanese Studies, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany; Jeffrey Hall, author and lecturer, Kanda University of International Studies, Eastern Japan; Dr Kristi Govella, associate professor of Japanese Politics and International Relations, University of Oxford, UK.

Presenter: William Crawley

Image credit: Reuters via BBC Images