The Cordillera Blanca mountain range in the Peruvian Andes is a region shaped by disaster. Before summiting a peak, farmer and mountain guide Saúl Luciano Lliuya pays his respects by laying coca leaves on the glacial ice. If he fails to show respect, he fears the mountains will be angry and reap havoc on the villagers below. For nearly a decade, Luciano Lliuya has been trying to make an energy giant based 6,500 miles away in Germany pay its respects to these mountains too. His landmark court action’s argument is simple: that climate change makes everyone in the world potential neighbours – so the company, RWE, should accept its share of responsibility for the deadly impacts of climate change in Peru.

As we approach the latest UN climate change conference, COP28, international companies are waking up to the financial risks posed by climate litigation. This is the inside story of Luciano Lliuya’s case, which has made it furthest of all.

The venue for the conference, the United Arab Emirates, is controversial not least because the country plans to increase oil production dramatically over the next few years, and the conference will be presided over by the chief-executive of its state-owned oil company. Here’s what else you should know about the venue for COP28.

Plus, do you struggle to get an appointment with your dentist? Do you even have a dentist? Going without regular checkups can put you at risk of missing signs of mouth cancer. It’s no substitute for seeing a professional, but here’s what you should look out for.

Mike Herd

Investigations Editor, Insights

Saúl Luciano Lliuya in front of the district court building in Hamm, Germany, November 2017. DPA Picture Alliance / Alamy Stock Photo

A Peruvian farmer is trying to hold energy giant RWE responsible for climate change – the inside story of his groundbreaking court case

Noah Walker-Crawford, UCL

If this case succeeds, it could set a precedent to hold major polluters responsible for the effects of climate change – even on the other side of the world.

UAE state oil company CEO and COP28 president, Sultan Al Jaber. AP Photo/Kamran Jebreili

COP28: inside the United Arab Emirates, the oil giant hosting 2023 climate change summit

Emilie Rutledge, The Open University; Aiora Zabala, The Open University

UAE will preside over talks to limit climate change – despite revelations it plans oil deals.

Vitaliy Abbasov/Shutterstock

How to check your mouth for cancer – when getting to see a dentist is hard

Michael Ho, University of Leeds

About half of new mouth cancer diagnoses in the UK are detected late.

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