Madeleine Finlay hears from the biodiversity and environment reporter Patrick Greenfield, who is reporting for the Guardian from Cop28 in Dubai. He describes the rollercoaster first week of highs and lows, which included an important agreement on loss and damage and a tetchy press conference from the summit president, Sultan Al Jaber. He also sets out what is still on the table as the second week of negotiations gets under way • This episode was amended on 7 December to reflect the fact that Sheikh Ahmed did not want to be interviewed. Help support our independent journalism at theguardian.com/sciencepod

As the pill becomes available over the counter and free of charge in England, Madeleine Finlay talks to science correspondent Nicola Davis about the problems women in the UK face in getting access to appropriate contraception, and how unwanted side-effects and lack of support have led to a rise in the popularity of fertility awareness-based methods. She also hears from Katie about her own journey trying to find the right contraception for her body. Help support our independent journalism at theguardian.com/sciencepod

Every year the world’s leaders gather for the UN climate change conference, and after a year of record temperatures, this year’s summit has been called the most vital yet. As Cop28 begins in Dubai, Ian Sample hears from Guardian environment editor and resident Cop expert Fiona Harvey. She explains why this summit proved controversial before it even began, what the main talking points will be, and how countries can still collaborate to meet the goals set out in 2015’s Paris agreement. Help support our independent journalism at theguardian.com/sciencepod

Science Weekly brings you episode one of a new mini-series from Full Story. Pioneering Australian scientists Graeme Pearman, Lesley Hughes and Ove Hoegh-Guldberg saw the climate crisis coming. Pearman predicted the increase of carbon dioxide levels, Hughes foresaw the alarming number of species extinctions and Hoegh-Guldberg forecast the mass coral bleaching events we’re seeing today. All three went on to become some of the country’s most respected experts in their fields, travelling the globe, briefing leaders, and assuming the world would take action having heard their alarming findings. In part one of this three-part series, these climate scientists reveal the moment they realised the planet was heading for catastrophe. What did they do when they found out? How did they think the world would respond? And how do they feel today, looking back on that moment of cognisance?. Help support our independent journalism at theguardian.com/sciencepod

Madeleine Finlay sits down with science correspondent Hannah Devlin to discuss the amazing discoveries the James Webb space telescope has made in the year since it became operational. From planets that rain sand, to distant galaxies, Hannah explains how some of these discoveries could fundamentally change our understanding of the universe. Help support our independent journalism at theguardian.com/sciencepod

A new report from Oxfam has found that the extravagant carbon footprint of the 0.1% – from superyachts, private jets and mansions to space flights and doomsday bunkers – is 77 times higher than the upper level needed for global warming to peak at 1.5C. Madeleine Finlay hears from the Guardian’s Europe environment correspondent Ajit Niranjan, and from wealth correspondent Rupert Neate, about the highly polluting transport habits of the ultra-wealthy. Help support our independent journalism at theguardian.com/sciencepod

As Iceland braces for a volcanic eruption, Madeleine Finlay hears from volcanologist Helga Torfadottir about how the country is preparing, and why this is happening now. She also speaks to Cambridge professor of volcanology Clive Oppenheimer about how scientists predict volcanic activity, and what it feels like to stare into a smouldering volcanic crater. Help support our independent journalism at theguardian.com/sciencepod

Last month the UK’s Food Standards Authority slashed the recommended safe daily intake of cannabidiol (CBD) from 70mg to 10mg. An estimated one in 10 people in the UK have used products containing CBD, and many users believe it can help with ailments such as insomnia, anxiety and pain. But is there any evidence for the supposed benefits, and what’s behind the FSA’s decision? Ian Sample talks to Dr Will Lawn of Kings College University, who has studied the health effects of CBD, to find out. Help support our independent journalism at theguardian.com/sciencepod

Ian Sample talks to Guardian global environment editor Jon Watts about the withering drought currently devastating the Amazon rainforest. Jon explains the complex mix of factors that are driving the drought, and considers whether it might be a catalyst for more concerted climate action in Brazil and beyond. Help support our independent journalism at theguardian.com/sciencepod

After Matthew Perry’s death was announced, a clip of the actor debating the science of addiction on the BBC’s Newsnight programme went viral. To find out where we’ve got to in our understanding of addiction, Ian Sample talks to Dr Nora Volkow, director of the US National Institute on Drug Abuse. She explains how brain imaging has advanced our understanding of this chronic disease. Help support our independent journalism at theguardian.com/sciencepod