Cleaning Up: Leadership in an Age of Climate Change

Michael Liebreich, Bryony Worthington
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Once a week, Michael Liebreich and Bryony Worthington have a conversation with a leader in clean energy, mobility, climate finance or sustainable development. Informative, inspiring and fun!

  1. The Billion-Tonne Promise of Carbon Dioxide Removal Isn't Working Out | Ep244: Robert Höglund

    1D AGO

    The Billion-Tonne Promise of Carbon Dioxide Removal Isn't Working Out | Ep244: Robert Höglund

    This week on Cleaning Up, Michael Liebreich sits down with carbon removal insider Robert Höglund, CEO of Marginal Carbon, co-founder of CDR.fyi and architect of MilkyWire’s Climate Transformation Fund, for a deep dive into what’s working and what’s not in carbon dioxide removal and corporate climate action. Drawing on five years of hands-on experimentation funding everything from biochar to direct air capture and policy advocacy, Höglund challenges the dominant “speed and scale” narrative. Instead, he makes the case for a new phase: prove and learn.  Together, Michael and Robert unpack why the highest-impact climate interventions are often the least measurable, why corporate net-zero targets are more conditional than we admit, and what it will actually take to make carbon removal credible, scalable, and worth paying for. Leadership Circle: Cleaning Up is supported by the Leadership Circle, and its founding members: Actis, Alcazar Energy, Davidson Kempner, EcoPragma Capital, EDP, Eurelectric, the Gilardini Foundation, KKR, National Grid, Octopus Energy, Quadrature Climate Foundation, Schneider Electric, SDCL and Wärtsilä. For more information on the Leadership Circle, please visit https://www.cleaningup.live. Links and more:  Marginal Carbon: Marginal CarbonCDR.fyi: https://www.cdr.fyi/MilkyWire Climate Transformation Fund: https://milkywire.com/Carbon Gap: https://carbongap.org/Julio Friedmann on Cleaning Up: https://youtu.be/DX7k6qnTxE8

    1h 10m
  2. The World Decides: Clean Energy or Oil & Gas? | Ep243: Damilola Ogunbiyi

    FEB 4

    The World Decides: Clean Energy or Oil & Gas? | Ep243: Damilola Ogunbiyi

    What if the future of clean energy isn’t decided in Washington, Brussels, or Beijing, but in Lagos, Nairobi, and Addis Ababa? Are we underestimating how fast the Global South is leapfrogging fossil fuels? And what happens when clean energy becomes the cheapest, fastest path to development, not a climate sacrifice? In this episode of Cleaning Up, Michael Liebreich is joined for a third time by Damilola Ogunbiyi, CEO and UN Special Representative for Sustainable Energy for All and Co-Chair of UN Energy. Together, they explore how Africa and the wider Global South are quietly reshaping the global energy transition, from rapid growth in solar, storage, mini-grids, and EVs to bold policy moves that many developed economies haven’t dared to make. They dive into why energy access is about dignity, health, and gender equality; why finance, not technology, is the real bottleneck; and how local capital, data, and innovation could determine whether “Most of World” powers its future with clean energy or fossil fuels. Leadership Circle: Cleaning Up is supported by the Leadership Circle, and its founding members: Actis, Alcazar Energy, Davidson Kempner, EcoPragma Capital, EDP, Eurelectric, the Gilardini Foundation, KKR, National Grid, Octopus Energy, Quadrature Climate Foundation, Schneider Electric, SDCL and Wärtsilä. For more information on the Leadership Circle, please visit https://www.cleaningup.live. Links and more: Sustainable Energy For All: https://www.seforall.orgDamilola’s past appearances on Cleaning Up:https://youtu.be/TbN1Y1C0idohttps://youtu.be/VcpNOmm1pMwBan Ki-moon on Cleaning Up: https://youtu.be/B14_MeRhfBwThe Sierra Leone Documentary: https://youtu.be/z-5QjSfy2SMClemens Calice on Cleaning Up: https://youtu.be/urmP7zN6n04Alain Ebobissé on Cleaning Up: https://youtu.be/ISTvp0BQz3E

    56 min
  3. The State of the Climate 2026 | Ep242: Zeke Hausfather

    JAN 28

    The State of the Climate 2026 | Ep242: Zeke Hausfather

    How do we model the climate system? How warm will 2026 be? And can geoengineering be anything more than a bandaid?  This week on Cleaning Up, Bryony Worthington sits down with leading climate scientist Dr. Zeke Hausfather on the day the 2025 global temperature data is released. Despite a La Niña year, the planet has just experienced one of its hottest years on record — pushing us ever closer to the 1.5°C threshold. Zeke explains why recent warming has accelerated, how declining air pollution may be unmasking hidden heating, and what disappearing cloud cover could mean for climate sensitivity.  The conversation ranges from the surprising accuracy of early climate models, the risks of rising nationalism, and what the U.S. withdrawal from international science means for the world.  They also tackle controversial questions:  Are worst-case climate scenarios still plausible? Is geoengineering a dangerous distraction — or an emergency brake? And can carbon removals ever work economically at scale. Leadership Circle: Cleaning Up is supported by the Leadership Circle, and its founding members: Actis, Alcazar Energy, Davidson Kempner, EcoPragma Capital, EDP, Eurelectric, the Gilardini Foundation, KKR, National Grid, Octopus Energy, Quadrature Climate Foundation, SDCL and Wärtsilä. For more information on the Leadership Circle, please visit https://www.cleaningup.live. Discover more: Zeke’s articles in the New York Times: https://www.nytimes.com/by/zeke-hausfather Zeke on LinkedIn: https://www.linkedin.com/in/zeke-hausfather-7327699/ Zeke’s Blog on Substack: https://www.theclimatebrink.com/p/my-2026-and-2027-global-temperature

    1h 11m
  4. ⁠Is Africa Poised To Be A Clean Energy Powerhouse? Ep241: Clemens Calice

    JAN 21

    ⁠Is Africa Poised To Be A Clean Energy Powerhouse? Ep241: Clemens Calice

    Why does Africa, home to 18% of the world’s population, receive just 1% of global energy investment? What’s stopping money from flowing to the continent when it has such good wind and solar potential? And what would it take to unlock an energy boom that benefits both Africa and Europe? Spread across 54 countries and with a combined GDP the size of Italy, Africa's population is young and growing rapidly. It is set to grow from 1.5 billion people today to 2.5 billion by 2050. And it could reach 4 billion by 2100, accounting for two out of every five people on the planet.  Africans want and deserve the same prosperity shared by richer parts of the world. And that means investment. So why is investment not flowing?  This week on Cleaning Up, Michael Liebreich speaks with Clemens Calice, CEO and founder of Cygnum Capital, which invests around $1.3 billion in Africa’s energy transition. Together they explore why risk perception and outdated models are slowing investment across Africa.  From rooftop solar for factories and mines, to electric motorbikes, power pools, and the geopolitics of gas, this episode makes the pragmatic case for how Africa can leapfrog to a cleaner, more resilient energy future. Leadership Circle: Cleaning Up is supported by the Leadership Circle, and its founding members: Actis, Alcazar Energy, Cygnum Capital, Davidson Kempner, EcoPragma Capital, EDP, Eurelectric, the Gilardini Foundation, KKR, National Grid, Octopus Energy, Quadrature Climate Foundation, SDCL and Wärtsilä. For more information on the Leadership Circle, please visit https://www.cleaningup.live. Discover more: Cygnum Capital: https://www.cygnumcapital.comEpisode 196, Lucy Heintz of Actis: https://www.youtube.com/watch?v=nhGDI_0QIHgEpisode 216, Daniel Calderon of Alcazar Energy: https://www.youtube.com/watch?v=WMhFOWO4C84Episode 120, Ana Hajduka, founder of Africa Green Co.: https://www.youtube.com/watch?v=ktWh_G6Sw_g

    59 min
  5. Climate Action vs Cost of Living: Can We Do Both? | Ep240: Katie White, UK Climate Minister

    JAN 14

    Climate Action vs Cost of Living: Can We Do Both? | Ep240: Katie White, UK Climate Minister

    How do we build a clean energy system while bringing UK bills down? Can the UK’s landmark Climate Change Act stand up to a fractured climate politics? And does increasing global instability make home-grown energy more important than ever? This week’s episode of Cleaning Up comes to you from inside of the UK’s Department for Energy Security and Net Zero, where last week Bryony Worthington sat down with Katie White MP, the UK’s recently appointed Climate Minister, to discuss her new role, what she’s excited about, and current challenges that she’s facing. Katie and Bryony met more than 20 years ago when they worked together at Friends of the Earth on the campaign for the Climate Change Act. In her new role, Katie is now the minister responsible for carbon budgets and net zero, alongside other climate priorities. It was only 12 months after she was elected as an MP for Leeds North West that Katie was promoted Climate Minister, in what she’s described as her dream job. From their shared history campaigning for the Climate Change Act to today’s challenges of energy affordability, electrification and public consent, Katie and Bryony unpack what’s working, what isn’t, and how to connect climate action to lower bills, stronger security and a better quality of life. Leadership Circle: Cleaning Up is supported by the Leadership Circle, and its founding members: Actis, Alcazar Energy, Cygnum Capital, Davidson Kempner, EcoPragma Capital, EDP, Eurelectric, the Gilardini Foundation, KKR, National Grid, Octopus Energy, Quadrature Climate Foundation, SDCL and Wärtsilä. For more information on the Leadership Circle, please visit https://www.cleaningup.live. Discover more: Katie White biography and brief: https://www.gov.uk/government/people/katie-whiteKatie White’s constituency website: https://katiewhitemp.org.uk/

    57 min
  6. Trump, Venezuela & The Future Of Clean Energy | Ep239: Michael Liebreich & Bryony Worthington

    JAN 7

    Trump, Venezuela & The Future Of Clean Energy | Ep239: Michael Liebreich & Bryony Worthington

    Is the link between oil and geopolitics starting to diminish? Has climate consensus fractured just as clean energy hits escape velocity? And are batteries, not barrels, becoming the true source of power and security? In the first episode of Season 17 of Cleaning Up, Michael Liebreich and Bryony Worthington unpack a turbulent start to 2026. From shock geopolitical moves in the Americas and riots in the Middle East to the curious calm of a $60 oil price, they explore whether fossil fuels still move the world the way they once did.  The conversation ranges from the collapse of climate multilateralism and Europe’s energy malaise to the unstoppable rise of electrification, batteries, and system-level clean energy solutions across China, India, Africa, and the “rest of the world.” Leadership Circle: Cleaning Up is supported by the Leadership Circle, and its founding members: Actis, Alcazar Energy, Davidson Kempner, EcoPragma Capital, EDP, Eurelectric, the Gilardini Foundation, KKR, National Grid, Octopus Energy, Quadrature Climate Foundation, SDCL and Wärtsilä. For more information on the Leadership Circle, please visit https://www.cleaningup.live. Discover more: The Electrification Staircase: https://www.watts-next.eu/ Kingsmill Bond on Cleaning Up: https://www.youtube.com/watch?v=G2bsoCOznXkArunabha Ghosh on Cleaning Up: https://www.youtube.com/watch?v=qMrn-JewoCoRachel Kyte on Cleaning Up: https://www.youtube.com/watch?v=V1m2lm2n_EECatch up on Season 16 of Cleaning Up: https://www.youtube.com/playlist?list=PLe8ZTD7dMaaDWQkhmAsaQ28p0h3Lw5I6v

    1h 8m
  7. Cleaning Up Redux: Canada's Controversial Queen of Green — Tzeporah Berman

    12/31/2025 · BONUS

    Cleaning Up Redux: Canada's Controversial Queen of Green — Tzeporah Berman

    This episode was originally broadcast in June 2023, watch the episode on YouTube here. Cleaning Up will return with new episodes January 7th, 2026.  Tzeporah Berman has been leading environmental campaigns in her native Canada and beyond for over thirty years. Today, she is Chair of the Fossil Fuel Non-Proliferation Treaty, and International Program Director at Stand.earth, the environmental organisation that she co-founded.  Tzeporah was formerly co-director of Greenpeace’s Global Climate and Energy Program, and her success campaigning against fossil development has seen her dubbed “Canada’s Queen of Green”. Tzeporah and Michael take in everything from helping turn Meta and other tech giants off coal and onto renewables, fighting fossil and pipeline expansion in Alberta, and whether a non-proliferation treaty could be the solution for a managed decline of fossil fuel use. Read more: The fossil fuel non proliferation treaty website: https://fossilfueltreaty.org

    1h 5m
  8. Cleaning Up Redux: Hot Rocks in a Box — Anand Gopal

    12/24/2025 · BONUS

    Cleaning Up Redux: Hot Rocks in a Box — Anand Gopal

    This episode was originally broadcast in June 2024. As the world transitions away from fossil fuels, one of the biggest challenges is decarbonizing industrial processes that require consistent, reliable sources of energy to produce high-temperatures. Typically these processes run on fossil gas, but now thermal batteries offer a solution by using electricity to store renewable energy in the form of heat.  Anand Gopal, Executive Director of Policy Research at Californian think tank Energy Innovation, joins Baroness Bryony Worthington to discuss his team's research on using thermal batteries to provide heat for manufacturing. Or as he calls them, hot rocks in a box. By storing intermittent solar or wind energy as the heat of molten salts or crushed rocks, thermal batteries can deliver reliable heat on-demand.  While the tech is almost at commercial availability, there's still one big obstacle: cost. In many countries it is still much cheaper to use gas over electricity, and that makes powering up thermal batteries uneconomical. So what needs to be done to employ them at scale? And will they take the wind out of hydrogen's sails? Find out on this week's episode of Cleaning Up.  Read more:  Energy InnovationIndustrial Thermal Batteries: Decarbonizing U.S. Industry While Supporting a High-Renewables GridEnergy Innovation's report on electric vehicle leasingEnergy Innovation's report on electric vs gas carsEnergy Innovation's report on industrial heat in ChinaEnergy Innovation's report on electrification of industrial heat

    58 min
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Once a week, Michael Liebreich and Bryony Worthington have a conversation with a leader in clean energy, mobility, climate finance or sustainable development. Informative, inspiring and fun!

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