Episodes

Bryony and Michael round up the eleventh season of Cleaning Up this week. They explore the themes running through the episodes, from theories of change to innovation, and discuss the things that surprised them, the moments they liked (or didn't) and reasons for optimism for the transition.

Michael chats with Saul Griffith, Australian-born engineer, inventor, advisor, author and 2007 MacArthur "Genius". He specialises in clean and renewable energy technologies, and has founded a dozen technology companies across 20 years in Silicon Valley, as well as authoring 3 books, including `Electrify', and `The Big Switch'. He has recently turned his attention from Otherlab, his independent Research and Development lab, to policy work and writing, including founding Rewiring America and Rewiring Australia, non-partisan organisations dedicated to electrification and decarbonisation and the associated policy and regulatory implications of meeting our climate goals.

Bryony speaks to two fascinating guests, both specialising in methane emissions, their causes and impacts: Dr. Sebastien Biraud and Sharon Wilson. Dr. Biraud is a biogeochemist, leading the Climate Sciences Department. Sebastien's work has taken him to the tropical rainforests of the Amazon, the great plains of the United States, and the Arctic tundra. He is currently co-leading/leading projects for the U.S. Department of Energy and the California Energy Commission. These projects involve integrating and applying high-precision greenhouse gas observations to advance research on the atmospheric carbon cycle and to enhance measurement, reporting, and verification of greenhouse gas emissions. Sharon is a 5th generation Texan who, after 12 years working for the oil and gas industry in Ft. Worth, left and bought 42 acres in Wise County. Unknown to her at the time was that George Mitchell was experimenting in Wise County to figure out how to produce oil and gas from shale. She had a …

This week, Michael presents the second part of his two-parter for Bloomberg New Energy Finance, exploring the bear and bull cases for the net zero transition. This week is the bull case: the "5 superheroes" of the transition, 5 forces/trends even more powerful than last week's "5 horsemen", which can prevail in the challenge of rapidly decarbonising the global economy. The 5 superheroes are: Exponential Growth, Systems Solutions, Great Power Competition, Disappearing Demand, and the Primary Energy Fallacy. And stay tuned until the end for a 6th "bonus" superhero! This audioblog is based on Michael's Bloomberg New Energy Finance opinion piece of the same title.

Michael is solo this week on Cleaning Up, outlining the "5 horsemen" of the net-zero transition - the five greatest obstacles to the net zero transition. These 5 horsemen are: the economics of energy solutions, the electrical grid, the demand for critical mineral, political and social inertia, predatory delay by the powerful incumbents. This audioblog is based on Michael's Bloomberg New Energy Finance opinion piece of the same title.

Bryony returns with Bonny Simi, President of Operations at Joby Aviation, where she's working on bringing to market a new civilian electric VTOL (eVTOL) aircraft. Prior to joining the team at Joby, Bonny held several operational and strategic roles at JetBlue Most notably, she founded and led JetBlue Technology Ventures, investing in improving the travel, hospitality, and transportation industries. As a pilot, Bonny has commanded Boeing, Airbus and Embraer aircraft at both United Airlines and JetBlue Airways. She is also an Emmy-nominated sports reporter and a 3-time Olympian in the sport of Luge.

Michael returns to talk with legendary educator and inventor, Donald Sadoway, Professor Emeritus of Materials Chemistry at MIT. After earning his PhD in chemical metallurgy in 1977 at the University of Toronto, he joined the faculty at MIT in 1978 where he spent 44 years. For 16 of those, he taught 3.091 (Introduction to Solid-State Chemistry)—and his animated lectures, peppered with references to music, art, and literature—doubtless contributed to the subject’s popularity. Among the many accolades bestowed on Professor Sadoway in his 44 years as a teacher and researcher at MIT was a compliment by Bill Gates: “best chemistry lessons anywhere. Unbelievable.” In 2012, for the invention of the liquid metal battery, he was named by Time magazine one of the “100 Most Influential People in the World.” He has founded several hard tech startups, including Ambri, Avanti Battery Company and Boston Metal.

Tamsin Lishman joins Bryony this week to talk heat pumps. Tamsin is CEO of Kensa Group, a Cornwall-based manufacturer and installer of ground source heat pumps. Kensa is the UK's only manufacturer of ground source heat pumps. Both air source and ground source heat pumps are rapidly growing technologies, and Tamsin believes that Kensa's heat pumps can - and will - be deployed to electrify domestic heating in the UK. On a recent episode of Cleaning Up, Fatih Birol, Executive Director of the IEA, argued that heat pumps are "the closest thing to a silver bullet" we have in the race to net-zero. In over two decades, Kensa has saved over 1 million tonnes of carbon through ground source heat pump installations. The Kensa Group is partly owned by Legal & General Capital, part of Legal & General PLC, and Octopus Energy. Tamsin was appointed CEO of Kensa Group in July 2023. Previously, she had stints at EnergyNest and Centrica. She holds a Master of Engineering from Oxford University.

Michael sits down this week with Lauri Myllyvirta, co-founder and lead analyst at CREA - the Centre for Research on Energy and Clean Air. After working as a campaigner and then as an analyst at Greenpeace, Lauri helped set up CREA, an NGO that produces research reports on the trends, causes, health impacts, and solutions to air pollution. Importantly, CREA makes extensive reference to local-language evidence sources - helped by Lauri's impressive knowledge of European and Asian languages.

This week, Bryony is back, this time to talk to David Wallace-Wells. David is an American journalist and author who often writes about climate change. His 2017 article "The Uninhabitable Earth" for New York Magazine was the publication's most-read article in history. David then turned the article into a book of the same name, which was chosen as Book of the Year, 2019, by The Sunday Times, The Spectator and New Statesman. He has a BA in History from Brown University.

This week, Michael's guest is Mark Cutifani, chairman of Vale Base Metals and formerly CEO of South African gold mining company, Ashanti, and British mining company, Anglo American. He was born and grew up in Wollongong, Australia. After leaving high school in 1976, he joined Coal Cliff colliery and enrolled in the University of Wollongong to complete a degree in Mining Engineering. He graduated in 1982, top of his class. After working for Coal Cliff, he joined Kalgoorlie Gold Mines, the Western Mining Corporation, Normandy Mining and Sons of Gwalia. In 2007, Cutifani left Inco Limited, where he held the position of chief operating officer. On 17 September 2007, he joined Ashanti, as a director of the company and was appointed CEO on 1 October that year. Shortly after joining Ashanti, Cutifani introduced a campaign called "Safety is our first value". Research into the 2007 fatalities at the company had shown that 70% of the fatalities were caused by sub-standard operations or acti…

Bryony returns in Season 11 this week, sitting down with her longtime friend Solitaire Townsend. Solitaire is Co-founder & Chief Solutionist at Futerra, and Trustee of the Solutions Union. She is a renowned sustainability expert and solutionist. From Google to the United Nations, Ikea to WWF, Solitaire works with the worlds’ most influential organisations to activate social justice and environmental restoration. Over two decades she has led the movement towards solutions, hope and optimism with numerous publications and keynotes at the UN, MIT, Ted and many more. She was named “Ethical Entrepreneur of the Year” in 2008 and more recently chair of the UK Green Energy Scheme, trustee of Ashden, a founder member of the United Nations Sustainable Lifestyles Taskforce and a London Leader for Sustainability. She holds master’s degrees in both Sustainable Development and Shakespeare.

Kicking-off 2024 and Season 11 is Ed Conway. Ed is the Economics editor at Sky News, covering major UK and international economics, business and political stories. He is also economics columnist for The Times, and has been one of the longest-running economics editors in UK journalism, having started covering the sector in 2003. He is the author of the book on Bretton Woods, The Summit: The Biggest Battle Of The Second World War – Fought Behind Closed Doors (Little, Brown, 2014) and an economics guidebook, 50 Economics Ideas You Really Need to Know (Quercus, 2009). Ed is a governor of the National Institute for Economic and Social Research, and has lectured on the international monetary system at the London School of Economics, the US Treasury and many other forums. His new book, Material World: A Substantial Story of Our Past and Future, explores the history, future and importance of six crucial substances: sand, salt, iron, copper, oil and lithium.