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The Inquiry
How soon can we go carbon zero?
The Inquiry
Nov 7, 2019

This month activists all over the world have taken over city centres, demanding urgent action to halt climate change. They say we need to eliminate all carbon emissions by 2025. Most people think that’s impossible. But scientists are warning that if we want to stop global warming, we need to cut our CO2 emissions fast. So how soon can the planet achieve carbon zero?

Helen Grady speaks to:

Chukwumerije Okereke, professor in Environment and Development at Department of Geography and Environmental Science, University of Reading and director of the Centre for Climate Change and Development, Alex Ekwueme Federal University (AE-FUNAI), Ndufu-Alike, Ebonyi state, Nigeria; Mercedes Maroto-Valer, Director of the Research Centre for Carbon Solutions at Herriot Watt University in Edinburgh, Scotland; Roger Pielke Junior, Professor at the University of Colorado; Rachel Moncrief, deputy director at the International Council on Clean Transportation

Producer: Beth Sagar-Fenton

(Photo: Wind turbines in California USA. Credit: David McNew/Getty Images)

More Episodes
Jun 23, 2026
Is technology ruining sport?

This year, technology has more influence in officiating sports than ever before.

At the men's World Cup, the role of virtual assistant referee technology (VAR) has been extended to include two more on-pitch scenarios while in tennis, umpires use electric line calling systems (ELC) to make final decisions.

Both bits of kit aim to improve the accuracy. It’s become easier to consider match-defining moments through these tracking and review systems’ specialised cameras. But, this information takes human officials valuable time to analyse.

Football fans criticise VAR for this reason, saying it delays match momentum. Top ranking tennis players Aryna Sabalenka and Alexander Zverev have also complained as these systems are not yet infallible. If technology is as imperfect as a human referee or umpire and can interrupt the fan experience too, why do elite sports rely on it?

This week on The Inquiry we’re asking, ‘Is technology ruining sport?’

Contributors Carlo de Marchis, independent advisor in sports and media technology in Italy

Dr Otto Koblinger, former sports scientist, Munich Technical University, Germany and senior data manager, Saudi Pro League

Professor Odilon Roble, sport philosopher and psychoanalyst, University of Campinas (UNICAMP), Brazil

Matt Moore, associate dean, University of Kentucky’s college of social work, US

Presenter: Tanya Beckett Producer: Evie Yabsley Researcher: Amelia Cox Editor: Tom Bigwood Technical Producer: Nicky Edwards Production Management: Phoebe Lomas and Liam Morrey

(Photo: VAR check. Credit: Dan Mullan/Getty Images)


23min 04sec



Jun 2, 2026
Is Portugal’s drugs policy in need of reform?

In 2001, Portugal decriminalised the possession and use of all illicit drugs. It was a move designed to mitigate the country’s public health crisis, which at the time meant Portugal had one of the worst rates of overdose deaths in Europe, as well as the highest rate of HIV among drug users. Whilst drugs remained illegal, users did not receive a criminal record but were instead referred to rehabilitation and treatment programmes. It was an approach that proved so successful, that it has remained in place for a quarter of a century.

But just over 10 years after its introduction, Portugal’s drugs policy started to come under strain as the country’s economic crisis and subsequent austerity measures led to budget cuts for drug services. More recently the rising cost of living has diverted people’s attention from investment in this field. On top of this, the trafficking of cocaine and newer substances into the country along with changing demographics is putting decriminalisation under strain.

So, on The Inquiry this week, we’re asking ‘Is Portugal’s drugs policy in need of reform?’

Contributors: Joana Teixeira, President of the Board of Directors, Institute for Addictive Behaviours and Dependencies (ICAD), Lisbon, Portugal Luís Mendão, Director General, Grupo de Ativistas em Tratamentos (GAT), Lisbon, Portugal António Leitão da Silva, Chief of Police, Braga, Portugal Keith Humphreys, Esther Ting Memorial Professor of Psychiatry and Behavioral Sciences at Stanford University, California, USA

Presenter: David Baker Producer: Jill Collins Sound engineer: Toby James Editor: Tom Bigwood

(Photo: Discarded syringes and drug paraphernalia. Credit: Andy Buchanan/AFP)


23min 21sec

How soon can we go carbon zero?

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