Michael Liebreich, Bryony Worthington

Cleaning Up: Leadership in an Age of Climate Change

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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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Michael Liebreich, Bryony Worthington

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News

Latest episode

Jul 8, 2026

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Episodes

⁠The Kraken Wakes: Creating the Utility of the Future | Ep175: Greg Jackson 04.09.2024

How does a startup become the largest provider of electricity in the UK in less than a decade? What is locational pricing and how could it encourage more renewables? And is it possible to achieve a zero-carbon electricity system by 2030?  Welcome to the first episode of Season 13 of Cleaning Up, in which Michael Liebreich sits down with Greg Jackson, the founder and CEO of Octopus Energy, to uncov...

The Future of Chinese Solar, Battery Myths & Climate Politics | Ep174: Michael Liebreich & Bryony Worthington 07.08.2024

In the final episode of Season 12, hosts Michael Liebreich and Bryony Worthington reflect on the key conversations and developments in the net-zero transition over the past three months, including:  China's leadership in green finance and the role of air quality issues in driving climate action The rapid growth of the solar industry and its potential to meet global electricity demand The progress...

The Solar Revolution - Past, Present and Future | Ep173: Jenny Chase 31.07.2024

The solar industry has experienced a meteoric rise over the past two decades, growing from a small cottage industry to one of the leading technologies in the energy transition. It’s not been a smooth ride, and there’ve been plenty of bankruptcies on the way, from Solyndra to Suntech, but more than half a terawatt of new solar is now being built each year and the industry is still growing rapidly....

'This Is A Narrative War' - How To Win The Climate Argument | Ep172: John Marshall 24.07.2024

Who are the merchants of doubt and how can their narrative be countered? How much money does it cost to get someone to take action on climate change? This week on Cleaning Up, Bryony Worthington is joined by John Marshall, the founder of the Potential Energy Coalition, a marketing firm that uses data-driven marketing techniques to accelerate the energy transition and climate action. They discuss:...

The Climate Challenge is an Engineering Challenge - Ep171: Dr. Rosemary Barnes 17.07.2024

This week on Cleaning Up, Michael Liebreich sits down with mechanical engineer and YouTube creator Dr Rosemary "Rosie" Barnes to discuss the critical role of engineering in addressing climate change. Rosie shares insights from her work developing clean energy technologies and her popular channel "Engineering with Rosie," where she tackles topics like wind turbine design, the hydrogen debate, and t...

The EV Revolution is Unstoppable - Ep170: Ben Nelmes 10.07.2024

Electric vehicles are finally becoming more mainstream, but this hasn’t stopped a flood of negative stories and political attempts to scare people away from making the switch to better, more cost efficient vehicles. So is the EV revolution now inevitable? Bryony Worthington sits down with Ben Nelmes, the Chief Executive of New Automotive, a UK-based not for profit focused on the clean energy trans...

What a New UK Government Means for Climate and Energy - Ep169: Dr Simon Evans 03.07.2024

With the UK general election tomorrow, the Cleaning Up team sits down with Dr Simon Evans of Carbon Brief to run through each party's manifesto, and what they say about UK climate and energy policy. With Labour widely predicted to win, will the UK's become an international leader on climate once more? How will GB Energy work? And where will all the money come from to fund the investments needed to...

Hot Rocks in a Box: The Rise of Thermal Batteries - ep168: Anand Gopal 26.06.2024

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 Re...

Texas Hold'em: Playing Poker With Methane - Ep167: Grant Swartzwelder 19.06.2024

Depending on who you ask, methane is either a useful transition fuel to a low-carbon future, or a super polluter. The science of methane says that for natural gas to have a lower climate footprint than other fossil fuels, particularly coal, there can be leakage of no more than 3.2% from end to end. Yet studies across the US show wildly different leakage rates. One of the most influential, by Rober...

Fake Meat, What’s The Beef? Ep166: Bruce Friedrich 12.06.2024

Has science cracked the code on mass producing realistic meat substitutes? Or are lab-gown alternative proteins an impossible dream? In this week's episode of Cleaning Up, Baroness Bryony Worthington sits down with president of the Good Food Institute, Bruce Friedrich, to explore the future of food. Friedrich details his vision for a more sustainable food system through technologies like plant-bas...

Battery Recycling Is Here - But Where Are The Batteries? - Ep165: Hans Eric Melin 05.06.2024

As everyone knows, battery prices are plummeting and manufacturing volumes are soaring, whether for EVs or for grid-connected storage. And everyone knows there's a problem: only 5% of lithium-ion batteries are recycled. The rest go to landfill, right? Wrong. This week's guest on Cleaning Up is the world's preeminent expert on battery recycling. Hans Eric Melin is the Founder and Managing Director...

#LightsOn - Live from the Eurelectric Power Summit 2024 in Athens - Ep164: Leonhard Birnbaum 29.05.2024

Last week the leading lights of Europe's electricity industry gathered for the annual Eurelectric Power Summit at the Lagonissi Beach Resort just outside Athens. The conference - under the hashtag this year of #lights on - lasted two days and covered the key issues facing Europe's and the world's power sectors. Two topics in particular stood out: the need to accelerate the build out of transmissio...

Can Nuclear Repower China's Coal Fleet? - Ep163: Staffan Qvist & Dr. Yaoli Zhang 22.05.2024

China's policies that direct capital towards cleaner industries have been game changing, and this week we're continuing the China theme, sharing two conversations Bryony had earlier this month at a conference at Xiamen University in Fujian Province. China's role in the clean energy transition could not be more important. The think tank Ember's latest report on the state of the global electricity t...

Audioblog 13: Clean Hydrogen's Missing Trillions 15.05.2024

The 5th Hydrogen Energy Ministerial in Tokyo announced that by 2030, the world would produce and use 90 million tonnes of renewable and low-carbon hydrogen. Then, last year, the 6th Hydrogen Energy Ministerial not only reiterated the 90 million tonne target, but went further, promising that the overall market for hydrogen would grow to 150 million tonnes by 2030. All very exciting, and it helped t...

Australia's Political Trim Tab - Ep162: Simon Holmes à Court 08.05.2024

Up this week is Simon Holmes à Court, the Australian investor and philanthropist with a passion for using data to change the world.  In 2022, the federal elections in Australia delivered an upset, as around a third of the electorate turned their back on the established parties and voted in seven new independent MPs taking the total to 10. Simon was responsible for a crowdfunding initiative - Clima...

Lily Cole's Search for Model Climate Solutions - Ep161 01.05.2024

How can we build a more united climate movement? What should be the role of geoengineering? And how can indigenous voices be brought into the climate conversation? Bryony puts these questions to model, actor, director, ambassador and businesswoman, Lily Cole. Lily's career began at age 14 when she was recruited as a model, pitching her into the high-octane world of fashion. She remains a self-conf...

How China Became a Green Finance Superpower - Ep160: Dr. Ma Jun 24.04.2024

Welcome to Season 12 of Cleaning Up! If you want a sense of the trajectory of climate action, you have to understand China, and you have to understand finance. There is no one better to share insights on both than Dr Ma Jun, Founder and President of the Institute of Finance and Sustainability in Beijing. Between 2014 and 2020, Dr Ma served as Chief Economist and then Member of the Monetary Policy...

Rounding Up Season 11 - Ep159: Michael Liebreich & Bryony Worthington 03.04.2024

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.    Links:  Ep149: Material World - Ed Conway: https://www.cleaningup.live/material-world-ep149-ed-conway/  Ep...

Absolutely Electrifying - Ep158: Saul Griffith 27.03.2024

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 Res...

The Methane Hunters - Ep157: Dr. Sebastien Biraud & Sharon Wilson 20.03.2024

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 f...

Audioblog 12: The Five Superheroes of the Transition 13.03.2024

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: Expon...

Audioblog 11: The Five Horsemen of the Transition 06.03.2024

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 Fin...

A Magnificent Woman And Her Flying Machines - Ep156: Bonny Simi 28.02.2024

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...

Extreme Electrochemistry for a Sustainable Future - Ep155: Prof Donald Sadoway 21.02.2024

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 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,...

Green Heat (And Cooling) Under Our Feet - Ep154: Tamsin Lishman 14.02.2024

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...

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