This week the Vatican is playing host to an international conference on climate change, at which many of the world's mayors and governors will discuss how we can adapt to the challenges of global warming. Could religious leaders help to win over some people who wouldn't listen to politicians?

Plus: ultra-long mortgages and Swiftonomics.

Olly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Jessica Hullinger, Guy Anker and Cindy Yu.

Each year tens of thousands of children, some as young as 10, are married in a handful of American states, including California, which have no lower age limit for marriage. Most of these weddings involve a young girl marrying a man who is over 18. Will a new campaign bring the practice to an end? Plus: Black maternal health and the price of olive oil.

Olly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Sorcha Bradley, Rebekah Evans and Emma Smith.

In Britain and beyond, health services are desperately seeking blood donors. But could science help ease the crisis? This week scientists have taken a step closer to being able to convert blood from one type to another, which would allow donations to be used more efficiently and effectively. Plus an immersive D-Day simulation, and analysing a weight-loss faux pas.Olly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Harriet Marsden, Arion McNicoll and Suchandrika Chakrabarti

Scientists are arguing that octopuses – and many other animals – experience consciousness. What does that mean for how humans treat them? Plus the size of the electric car market, and Morocco's controversial football kitOlly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Harriet Marsden, Jessica Hullinger and Emma Smith

What is happening in Sudan? Could London really end rough sleeping? And why has Joe Lycett been making up stories? Olly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Mariana Vieira, Rebekah Evans and Jamie Timson

Is the "Hardest Geezer" a high-endurance trendsetter? Will Ted Baker survive? And what's the beef with lab-grown meat? Olly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Harriet Marsden, Leaf Arbuthnot and Holden Frith

What's behind a row about an uninhabited rock? How did Bassirou Diomaye Faye get from a Senegalese jail to the presidency – in just two weeks? And how often should we wash? Olly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Julia O'Driscoll, Arion McNicoll and Suchandrika Chakrabarti

Is it time to say sorry for slavery? Can female sport stars close the pay gap? And is country music moving into the mainstream? Olly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Rebekah Evans, Emma Smith and Jamie Timson

What's behind the EU's deal with Egypt? Should we mine the seabed for minerals? And are we getting more prudish about movies? Olly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Holden Frith, Jamie Timson and Leaf Arbuthnot.

What can we do about abandoned property? Are old mines still doing us harm? And what do LP sales tell us about the economy? Olly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Harriet Marsden, Julia Macfarlane and Guy Anker.

Can satellites stop methane leaks from space? Are British whale-beachings on the rise? And what's gone wrong at Soho House? Olly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Jessica Hullinger, Harriet Marsden and Julia O'Driscoll