Wind and solar power will play a crucial role in curbing climate change, but what happens to all the worn-out turbines and photovoltaic panels once they are past their best? Most wind turbine blades are almost impossible to recycle, and solar panels are very expensive to disassemble, but efforts are under way to prevent a possible renewable waste mountain. Presenter Graihagh Jackson hears how old wind turbine blades are being turned into everything from bridges to flowerbeds, and we visit one of the world’s only solar panel recycling facilities. Plus – what’s the carbon footprint of a wind turbine or a solar panel in the first place? Plus we hear from listeners Prateek, Alex and Elle. Let us know what you think about the show – email theclimatequestion@bbc.com Contributors: Paul Leahy, lecturer in wind energy at University College Cork, Republic of Ireland, and principal investigator at Re-Wind; Ute Collier, deputy director of the Knowledge, Policy and Finance Centre at the International Renewable Energy Agency, Abu Dhabi; Guy Chichignoud, chief technology officer, ROSI, France; Vivian Jia Tong Li, campaigner for Greenpeace East Asia, Beijing. Producer: Simon Tulett Researchers: Matt Toulson and Pierre-Antoine Denis Series Producer: Alex Lewis Editor: Simon Watts Sound engineer: Tom Brignell Production Coordinators - Siobhan Reed and Sophie Hill

It may sound like the stuff of science fiction, but the idea of assembling giant solar farms in space and then beaming the renewable energy back down to Earth is gaining real life traction. Some advocates have claimed it could supply all the world’s energy needs by 2050. But how would these solar farms be assembled, how much fuel and money would it take to blast them into space in the first place, and how would we safely beam their energy back to Earth? Sophie Eastaugh and Luke Jones speak to Sanjay Vijendran, in charge of space-based solar at the European Space Agency, learn about the history of the idea from Rick Tumlinson, founder of SpaceFund, and hear words of caution from Dr Jovana Radulovic, head of mechanical and design engineering at Portsmouth University in the UK. Plus, French astronaut Thomas Pesquet describes life on the International Space Station and how it’s powered. Thanks to the Space Studies Institute for extracts of their interview with Gerard O’Neill. Let us know what you think about the show – email theclimatequestion@bbc.com Producer: Simon Tulett Researchers: Matt Toulson and Graihagh Jackson Series Producer: Alex Lewis Editor: China Collins Sound engineer: Tom Brignell Production Coordinator - Siobhan Reed

In 1856, an American woman called Eunice Newton Foote discovered that higher levels of carbon dioxide would warm the planet. But credit for discovering climate change was given to someone else who made the same discovery three years later. We celebrate Foote’s role in early climate science by recreating her little-known experiment and asking if there are some voices that continue to be overlooked in climate science today – and how we overcome these climate blind spots? Presenter Graihagh Jackson is joined by: Dr Alice Bell, Head of Climate and Health Policy at Wellcome and author of ‘Our Biggest Experiment – An Epic History of the Climate Crisis’ Professor Regina Rodrigues, Professor of Physical Oceanography and Climate at the Federal University of Santa Catarina in Florianopolis, Brazil. Professor Andrea Sella, Professor of Chemistry at University College London. Producer: Louise Parry Researcher: Louise Byrne Series Producer: Alex Lewis Editor: Richard Vadon Sound Engineer: Graham Puddifoot Email us: theclimatequestion@bbc.com

With rolling blackouts and huge waste disposal issues a regular occurrence in large parts of Sub-Saharan Africa, we look at how green tech start-ups offer smart, climate-friendly ways to solve the issues holding the region back. In Malawi, our repórter Peter Jengwa meets Admore Chiumia, whose company Green Impact Technologies turns waste into energy. In Zimbabwe, the BBC’s Shingai Nyoka visits AI entrepreneur Leroy Nyangani who’s come up with a way of making solar energy more financially accessible, while also solving a big problem of energy access in the country where, almost 70% are not connected to the grid and blackouts are the norm. Audrey-Cynthia Yamadjako from the African Development Bank outlines a new scheme designed to support green SMEs on the continent. Presenter Luke Jones is joined by the BBC’s Karnie Sharp who was raised in South Africa. They discuss how, with proper support, green solutions to everyday problems may unlock Africa’s economic and human potential. Producer: Ivana Davidovic Researcher: Matt Toulson Series producer: Alex Lewis Editor: Richard Vadon Sound: Tom Brignell

Worsening energy blackouts are crippling South Africa. They’re being caused in part by an over-reliance on ageing coal-fired power stations which can’t produce enough electricity. The government has an ambitious plan to rapidly build up solar and wind power by opening up the grid to private providers. But it’s facing opposition from the coal lobby. Will this electricity crisis be the thing that finally pushes South Africa to implement its climate plan? And can it be implemented in a way that treats all South Africans equally, and doesn’t unfairly benefit a rich minority? Presenters Sophie Eastaugh and Luke Jones are joined by: Dr Nthabiseng Mohlakoana, expert in South Africa’s Just Energy transition, Delft University of Technology in the Netherlands Steve Nicholls, Head of Mitigation at the Presidential Climate Commission, South Africa’s Elna Schutz, freelance journalist who spoke to businesses in and around Johannesburg Email us: theclimatequestion@bbc.com Producer: Laurence Knight Researcher: Matt Toulson Production Coordinators: Sophie Hill and Siobhan Reed Series Producer: Alex Lewis Editor: Richard Vadon Sound Engineer: Tom Brignell

The effects of climate change on weather patterns around the world, including seasonal temperatures and rainfalls, are being felt keenly in agriculture – with shifting seasons and varying yields undermining years of habit-formed knowledge and process. Technology experts are helping farmers, including in some of the world’s poorest regions, adapt to the new food production landscape through the use of artificial intelligence, or AI, and machine learning. Presenters Sophie Eastaugh and Luke Jones are joined by: Ranveer Chandra, Managing Director for Research for Industry and the CTO of Agri-Food at Microsoft Himanshu Gupta, Co-founder and CEO of ClimateAI Dr Claudia Ringler, Deputy Director of Environment and Production Technology Division at the International Food Policy Research Institute Email us: theclimatequestion@bbc.com Producer: Ben Cooper Researchers: Matt Toulson and Laura Cain Production co-ordinator: Siobhan Reed and Sophie Hill Series Producer: Alex Lewis Editor: Richard Fenton-Smith Sound Engineer: James Beard

Some oil and gas giants are being pushed by shareholders to adopt more climate friendly strategies. An environmental law charity is suing the directors of a global oil company, arguing their climate strategy is not adequate to meet current targets, supported by other shareholders. Elsewhere, a group of investors in another fossil fuel giant, recently unseated multiple board members in an effort to force a change of direction. How effective is this form of activism? Presenter Paul Connolly is joined by: Chris James, Founder and Chief Investment Officer at Engine No.1, US Camila Domonoske, NPR journalist, US Tariq Fancy, former Global Chief Investment officer for Sustainable Investing at BlackRock, Canada Email us: theclimatequestion@bbc.com Producers: Ben Cooper and Mora Morrison Researcher: Matt Toulson Production Coordinator: Siobhan Reed and Sophie Hill Series Producer: Alex Lewis Editor: China Collins Sound Engineer: James Beard and Rod Farquhar

Our warming world is changing the geographical distribution of several animal species. Mosquitoes have been able to colonise new regions, places where they haven’t been found before including Afghanistan and countries in Europe. According to the World Health Organisation, dengue fever is the most critical mosquito-borne viral disease in the world. Globally there’s been a 30-fold increase in infections in the last 50 years. But is there a way to prevent the spread of the disease? Presenter Paul Conolly is joined by: Valdya Baraputri, reporter, BBC News Indonesia in Jakarta Dr. Dewi Iriani, Paediatrician at Koja Hospital, Jakarta Dr Nyla, Vice Director of Koja Regional Hospital, Jakarta Dr. Imran Pambudi, Director of Infectious Diseases Prevention and Control, Health Ministry of Indonesia Manisha Kulkarni, Associate Professor University of Ottawa in the School of Epidemiology and Public Health Felipe Colon Gonzalez, Technology Lead The Wellcome Trust, London Email us: theclimatequestion@bbc.com Producer: Ivana Davidovic Researcher: Matt Toulson Production Co-ordinators: Siobhan Reed and Sophie Hill Series Producer: Alex Lewis Editor: China Collins Sound Engineer: Rod Farquhar

Record-breaking temperatures in the Alps in Europe have led to a disappointing ski season so far. Some slopes have been more brown than white, while others have been forced to close all together. Many worry this is a bad omen for the whole industry – which employs thousands globally. This is part of a wider trend of unpredictable weather. Some ski resorts are trying to adapt, by making artificial snow for example, but these short-term measures aren’t always sustainable. It’s predicted that the Alps will have 25% less snow by 2050, whereas resorts in Arctic Sweden are forecast to stay colder for longer. Could the northern country become skiing’s last resort, or will the industry have to fundamentally change to survive? Presenter Graihagh Jackson is joined by: Anna Richards, freelance journalist Linda Lundmark, associate professor at Department of Geography at Umea University Mathias Vuille, professor of Atmospheric and Environmental Sciences at the University of Albany Rob Stewart, writer and PR Director for Ski Press With thanks to additional research by Harald Rice, University of Surrey. Email us: theclimatequestion@bbc.com Producers: Ben Cooper and Mora Morrison Researcher: Matt Toulson Production Coordinator: Siobhan Reed and Sophie Hill Series Producer: Ros Jones Editor: China Collins Sound Engineer: Tom Brignell

Natural gas is often seen as an environmentally friendly alternative to coal, yet it’s a fossil fuel and gives off climate warming emissions when burned. On the internet there are many adverts suggesting that natural gas is a clean and green way to reduce emissions. We investigate whether these adverts mislead the public as to whether gas is really ‘green.’ Presenters Graihagh Jackson and Marco Silva are joined by: Pep Canadell, Executive Director of the Global Carbon Project & Chief Research Scientist at CSIRO Naomi Oreskes, Professor of the History of Science and affiliated Professor of Earth and Planetary Sciences at Harvard University Former Senator, Mary Landrieu, co-chair of ‘Natural Allies for a Clean Energy Future’ Email us: theclimatequestion@bbc.com Producers: Frances Read and Marco Silva Researchers: Natasha Fernandes and Matt Toulson Production Coordinator: Siobhan Reed Series Producer: Alex Lewis Editor: China Collins Sound Engineer: Tom Brignell