Cleaning Up: Leadership in an Age of Climate Change
Michael Liebreich, Bryony Worthington

Latest episode
298 episodes
How Renewables Are Replacing Australia's Ageing Coal Fleet | Deep Dive Australia 07: Paul Simshauser
10/08/2026 | 48 mins.Australia has one of the world's fastest-moving electricity systems. It leads the world in rooftop solar, has deployed grid-scale batteries at extraordinary speed, and is now starting to replace its ageing coal fleet with cleaner sources of energy. But as renewable costs rise and electricity demand grows, can the transition remain affordable while maintaining a reliable power system?
This week on Cleaning Up, Michael Liebreich is joined by Paul Simshauser, CEO of Iberdrola Australia, and one of Australia's leading energy economists. Drawing on decades of experience across electricity markets, networks and policy, Paul explains what makes Australia's power system unique, and what the rest of the world can learn from it.
They discuss why rooftop solar has become so successful in Australia, how batteries are transforming electricity markets, and how the country's energy-only market encourages investment. They also explore the economics of replacing ageing coal plants, the costs of new renewable generation, the role of electricity pricing and demand tariffs, and what will be needed to build a resilient, affordable power system as Australia moves towards net zero.
Topics discussed in this episode:
The rooftop solar revolution
How batteries are reshaping the grid
Why solar is cheaper in Australia than elsewhere
The challenges of retiring coal
Whether renewables can stay affordable
Building a resilient power system
Leadership Circle:
Cleaning Up is proud to be supported by its Leadership Circle. The members are Actis, Alcazar Energy, Arup, Copenhagen Infrastructure Partners, Cygnum Capital, Davidson Kempner, EcoPragma Capital, EDP, Eurelectric, the Gilardini Foundation, KKR, Mitsubishi Heavy Industries, National Grid, Octopus Energy, Quadrature Climate Foundation, Schneider Electric, SDCL and Wärtsilä. For more information about the Leadership Circle, visit cleaningup.live
Links:
Paul Simshauser’s bio: https://www.linkedin.com/in/paul-simshauser-00106713/
Iberdrola Australia: https://www.iberdrola.com.au
Link to Paul’s articles: https://experts.griffith.edu.au/18942-paul-simshauser/publications
Malcolm Turnbull on Cleaning Up https://www.youtube.com/watch?v=t9CUGRHCswU&t=5s
Marc England on Cleaning Up https://www.youtube.com/watch?v=1tKVSJcS_SI
Darren Miller on Cleaning Up https://www.youtube.com/watch?v=iBhkBTZ9lSI&t=2s
Tony Abbott on Cleaning Up https://www.youtube.com/watch?v=_39HmAgq9RY&t=1s
Subscribe to our newsletter: https://cleaninguppod.substack.com/
Acronyms:
STC: Small-scale Technology Certificates
CFD: Contract For Difference
PPAs: Power Purchase Agreements
IBGYBG: “I'll be gone, you'll be gone.”
OEM: Original Equipment Manufacturer
AEMO: Australian Electricity Market Operator
LNG: Liquefied Natural Gas
Chapters:
00:00 - Intro
02:28 - Paul's Background
04:07 - Iberdrola Australia
06:42 - Australia's Power System
09:15 - Battery Revolution
12:36 - Energy-Only Market
14:35 - Why Solar Succeeds
18:21 - Commercial Solar Challenge
24:30 - Ageing Coal Fleet
28:49 - Carbon Markets & Pricing
35:00 - Renewable Costs
39:18 - Future Demand
42:45 - Grid Resilience
48:00 - Outro- Microbes rarely feature in discussions about climate change, yet they play a central role in regulating greenhouse gases through the Earth's carbon, methane and nitrogen cycles. As the climate changes, understanding these natural processes is becoming increasingly important to develop new approaches to clean energy, agriculture and emissions reduction.
This week on Cleaning Up, Bryony Worthington speaks with Professor Emeritus David Kirchman of the University of Delaware, one of the world's leading microbial ecologists and author of 'Microbes: the Unseen Agents of Climate Change.'
They explore how microbes drive the carbon, methane and nitrogen cycles, how climate change is reshaping ecosystems from permafrost to coral reefs, and how microbial science could help tackle the climate crisis, from microbial fuel cells and lower-emissions agriculture to biofuels, methane reduction and even emerging forms of carbon removal and geoengineering
Topics covered in this episode:
The microbes shaping Earth's climate
Ocean carbon cycle
Methane-eating microbes
Arctic warming impacts
Coral reefs and climate resilience
Low-carbon agriculture
Microbes powering climate solutions
Climate interventions
Leadership Circle:
Cleaning Up is proud to be supported by its Leadership Circle. The members are Actis, Alcazar Energy, Arup, Copenhagen Infrastructure Partners, Cygnum Capital, Davidson Kempner, EcoPragma Capital, EDP, Eurelectric, the Gilardini Foundation, KKR, Mitsubishi Heavy Industries, National Grid, Octopus Energy, Quadrature Climate Foundation, Schneider Electric, SDCL and Wärtsilä. For more information about the Leadership Circle, visit cleaningup.live
Links:
David Kirchman’s bio: https://www.linkedin.com/in/david-kirchman-5925b331/
David’s book: Microbes, the Unseen Agents of Climate Change: https://www.amazon.co.uk/Microbes-Unseen-Agents-Climate-Change/dp/019768856X
Merlin Sheldrake on Cleaning Up: https://www.youtube.com/watch?v=YC-9ulSTnB4
Sea ice melting effect on microbes article: https://www.nature.com/articles/s41598-024-77821-9
Background on James Lovelock's Gaia Hypothesis: https://courses.seas.harvard.edu/climate/eli/Courses/EPS281r/Sources/Gaia/Gaia-hypothesis-wikipedia.pdf
DMS: Dimethyl Sulphide
Subscribe to our newsletter: https://cleaninguppod.substack.com/
Chapters:
00:00 - Intro
00:45 - About David Kirchman
05:50 - What Are Microbes?
15:29 - Climate Cycles & Carbon
23:04 - Methane Microbes
29:01 - Climate Change
34:41 - Coral Reefs
41:02 - Microbe Climate Solutions
50:10 - Climate Engineering
01:00:28 - Outro Why The Transition Hasn't Made Australians Rich Yet | Deep Dive Australia 06: David Pocock
03/08/2026 | 52 mins.David Pocock is one of Australia's most influential politicians, working as the Senator of the Australian Capital Territory. He brings a distinctive perspective to some of the country's biggest debates, from climate policy and energy security to democratic reform and the future of work.
A former captain of the Australian rugby team, David entered politics after years of speaking out on issues including climate change, equality and environmental protection. Four years into his Senate career, he joins Michael Liebreich to explain how independent politics works in practice, what he's hearing from voters across Australia, his campaign to tax natural gas exports, and why he believes the country's clean energy transition must deliver lower household bills as well as lower emissions.
The conversation explores Australia's world-leading rooftop solar uptake, the barriers slowing electric vehicle adoption, and why David believes Australians deserve a greater return from the country's gas exports. They also look ahead to the rise of AI and data centres, asking whether governments are paying enough attention to the implications for jobs, tax revenues and energy demand.
Topics covered in this week's episode:
David’s journey from rugby player to Senator
Australian voters' priorities
Lowering household energy bills
Australia's clean energy successes
Why EV adoption lags
Taxing Australia's gas exports
Data centres and energy demand
AI concerns and the future of work
Leadership Circle:
Cleaning Up is proud to be supported by its Leadership Circle. The members are Actis, Alcazar Energy, Arup, Copenhagen Infrastructure Partners, Cygnum Capital, Davidson Kempner, EcoPragma Capital, EDP, Eurelectric, the Gilardini Foundation, KKR, Mitsubishi Heavy Industries, National Grid, Octopus Energy, Quadrature Climate Foundation, Schneider Electric, SDCL and Wärtsilä. For more information about the Leadership Circle, visit cleaningup.live
Links:
David Pocock’s bio: https://www.davidpocock.com.au/about
David Pocock “Chains himself to digger” news article: https://www.bbc.co.uk/sport/rugby-union/30272670
Aksel Lund Svindal on Cleaning Up: https://www.youtube.com/watch?v=cRc1VCBnVgI
Alex Honnold on Cleaning Up: https://www.youtube.com/watch?v=MwmQf0mhHkE
Prince Albert of Monaco on Cleaning Up: https://www.youtube.com/watch?v=p-eYHKpDBYU
Håkan Agnevall (Wärtsilä) on Cleaning Up: https://www.youtube.com/watch?v=dUYjGT55g5A
Subscribe to our newsletter: https://cleaninguppod.substack.com/
Acronyms:
C&I: Commercial and Industrial
ICE: Internal Combustion Engine
ACT: Australian Capital Territory
Chapters:
00:00 Intro
01:48 From Rugby to Politics
11:46 Getting Arrested For Activism
16:35 What Voters Want
20:34 Rising Voter Frustration
26:16 Australia's Energy Report
28:57 Why EVs Lag Behind
31:19 Taxing Gas Exports
36:09 Data Centre Dilemma
39:46 AI vs Human Jobs
44:47 Delivering Real Results
49:44 Outro- The UK is heavily exposed to global energy markets and has some of the highest electricity prices in Europe. At the same time, vast amounts of heat generated across industry and infrastructure go unused. Whether it should be called "waste" is a matter of debate, but could making better use of the energy we already produce be one of the biggest untapped opportunities in the energy transition?
This week, Michael Liebreich is joined by Jonathan Maxwell, founder and CEO of SDCL, a specialist investment firm focused on energy efficiency. They explore why energy efficiency should be treated as a strategic resource, why “waste” heat could become one of Europe's most overlooked energy resources, and how Europe and the UK can strengthen its energy resilience following renewed tensions in the Strait of Hormuz.
They discuss the economics of gas versus electricity, the rapid growth of AI-driven data centres and their power requirements, and how long-term infrastructure investment can help build a more resilient, affordable and efficient energy system.
Topics covered in this episode:
The Strait of Hormuz and Europe's energy security
The UK's energy system and the cost of electrification
Gas versus electricity pricing
Debating “waste” heat and energy efficiency
AI, data centres and growing power demand
Powering and cooling next-generation infrastructure
Infrastructure investment and portfolio management
Europe's energy transition beyond the AI boom
Leadership Circle:
Cleaning Up is proud to be supported by its Leadership Circle. The members are Actis, Alcazar Energy, Arup, Copenhagen Infrastructure Partners, Cygnum Capital, Davidson Kempner, EcoPragma Capital, EDP, Eurelectric, the Gilardini Foundation, KKR, Mitsubishi Heavy Industries, National Grid, Octopus Energy, Quadrature Climate Foundation, Schneider Electric, SDCL and Wärtsilä. For more information about the Leadership Circle, visit cleaningup.live
Links:
Jonathan Maxwell’s bio: https://www.linkedin.com/in/jonathan-maxwell-a121a533/
Jonathan on Cleaning Up 2024: https://www.youtube.com/watch?v=vN2YWPqBPHk
Jonathan on Cleaning Up 2023: https://www.youtube.com/watch?v=1OTbyOxYUpg
Jonathan on Cleaning Up 2020: https://www.youtube.com/watch?v=Wqrtr2lePM8
Jonathan’s substack: https://jonathanmaxwell.substack.com/
The Edge by Jonathan Maxwell: https://the-edge-book.com/product/the-edge-by-jonathan-maxwell/
SDCL: https://www.sdclgroup.com/
Ed Conway on Cleaning Up: https://www.youtube.com/watch?v=VhvEExdYeEU
Robert Dunn on Cleaning Up: https://www.youtube.com/watch?v=juAyLAUmU3w
Subscribe to our newsletter: https://cleaninguppod.substack.com/
Acronyms:
LNG: Liquified Natural Gas
JCPOA: Joint and Comprehensive Plan of Action
CHP: Combined Heat and Power
PUE: Power Usage Effectiveness
CCHP: Combined Cooling Heat and Power
EBITDA: Earnings before interest, taxes, depreciation, and amortisation
Chapters:
00:00 - Europe's Energy Security
05:11 - Strait of Hormuz Impact
15:39 - Electrifying the UK
23:14 - Gas vs Electricity
28:56 - Waste Heat Debate
32:14 - Powering Data Centres
42:20 - AI Investment
46:42 - Cooling Data Centres
52:16 - Managing Energy Assets
01:06:47 - Outro Can Australia Become A Clean Tech Superpower? Deep Dive Australia 05: Ross Garnaut
27/07/2026 | 57 mins.Across huge swathes of the global economy, clean solutions are already cheaper than their fossil alternatives, and so a carbon price isn’t needed. But in other sections of the economy, the costs of green tech are higher, and so carbon pricing will be needed to make them cost competitive. But what should that price be, and how can it be successfully implemented?
This week on Cleaning Up, Michael Liebreich is joined by Professor Ross Garnaut, a towering figure in the debate about how to implement carbon pricing, and founder of the Superpower Institute. Having advised successive Australian governments on climate policy since 2007, Ross makes the case for how Australia can export green iron, ammonia, and carbon-based fuels to industrialised economies that don't have the land or renewable resources to decarbonise on their own.
They discuss the political history behind Australia's stop-start carbon pricing, the debate over whether green hydrogen can ever get cheap enough to make the superpower vision work, and how First Nations communities are shaping decisions about the land at the centre of it. They also explore the tension between protectionism and genuine security concerns over Chinese supply chains, and whether China's undervalued currency is really what's holding back Australia's competitiveness.
Topics covered in this episode:
Australian climate policy under different Prime Ministers
Australia as a low-carbon superpower
Exporting molecules vs exporting electricity
First Nations involvement in land use
The green hydrogen cost debate
Protectionism vs. security concerns
Pinning down an actual carbon price
Trade imbalances and exchange rates
Leadership Circle:
Cleaning Up is proud to be supported by its Leadership Circle. The members are Actis, Alcazar Energy, Arup, Copenhagen Infrastructure Partners, Cygnum Capital, Davidson Kempner, Ecopragma Capital, EDP, Eurelectric, the Gilardini Foundation, KKR, Mitsubishi Heavy Industries, National Grid, Octopus Energy, Quadrature Climate Foundation, Schneider Electric, SDCL and Wärtsilä. For more information about the Leadership Circle, visit cleaningup.live.
Links:
Watch our full Deep Dive Australia Series: https://youtube.com/playlist?list=PLc8cNKXCII70&si=GmXz-zQe3yK42V3o
Ross Garnaut’s bio: https://www.rossgarnaut.com.au/
Malcolm Turnbull on Cleaning Up: https://www.youtube.com/watch?v=t9CUGRHCswU
Tony Abbott on Cleaning Up: https://www.youtube.com/watch?v=_39HmAgq9RY
The Superpower Institute: https://www.superpowerinstitute.com.au/
The SuperPower Institute reports: https://www.superpowerinstitute.com.au/work?type=report
Ross' book — Superpower: Australia's Low-Carbon Opportunity by Ross Garnaut: https://www.blackincbooks.com.au/books/superpower
More Business podcasts
Trending Business podcasts
About Cleaning Up: Leadership in an Age of Climate Change
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!
Podcast websiteListen to Cleaning Up: Leadership in an Age of Climate Change, The Property Academy Podcast and many other podcasts from around the world with the radio.net app

Get the free radio.net app
- Stations and podcasts to bookmark
- Stream via Wi-Fi or Bluetooth
- Supports Carplay & Android Auto
- Many other app features
Get the free radio.net app
- Stations and podcasts to bookmark
- Stream via Wi-Fi or Bluetooth
- Supports Carplay & Android Auto
- Many other app features


Cleaning Up: Leadership in an Age of Climate Change
Scan code,
download the app,
start listening.
download the app,
start listening.





























