

Solving for Climate
Rob Stewart
Data scientist Hannah Ritchie and sustainability nerd Rob Stewart are climate optimists. They join forces to unpack solutions to the climate crisis, and the innovators, entrepreneurs and scientists behind them. Hosted on Acast. See acast.com/privacy for more information.
Episodes
Mentioned books

31 snips
Jun 24, 2025 • 39min
Dr Marit Brommer: Why don’t we use more geothermal energy?
Dr. Marit Brommer, the Head of the International Geothermal Association, passionately argues for the untapped potential of geothermal energy to revolutionize our power sources. She discusses how it currently accounts for less than 0.5% of global electricity and outlines the vast benefits it offers for heating and renewable energy generation. Marit highlights successful case studies, the need for supportive policies, and the challenges of transitioning from fossil fuels. With advancements in technology, she envisions a future where geothermal is a major player in sustainable energy.

Jun 17, 2025 • 36min
Heikki Malinen: Does sustainable aviation fuel work?
Heikki Malinen, CEO of Neste, a leader in sustainable aviation fuel development, discusses the transformative potential of SAF for the aviation industry. He highlights how these fuels can reduce carbon emissions by up to 80% but faces challenges like production costs and regulatory hurdles. The conversation digs into the competitive landscape, particularly China's advantages and the necessity for technological advancements. Malinen emphasizes the urgent need for societal and governmental support to navigate the transition toward more sustainable air travel.

7 snips
Jun 10, 2025 • 32min
Guillaume Lambotte: Inside the race to decarbonise steel
Guillaume Lambotte, Chief Scientist at Boston Metal, is at the forefront of revolutionizing steel production to combat climate change. He discusses the steel industry's significant carbon footprint and the promising innovation of molten oxide electrolysis. Lambotte emphasizes that while decarbonizing this age-old industry won't happen overnight, even minor emission reductions can make a big difference for our planet. He also addresses the need for a universal framework to support sustainable practices in steel manufacturing.

8 snips
Jun 3, 2025 • 34min
Mark Titley: How do we stop deforestation?
Mark Titley, a senior researcher at Trase, utilizes satellite imagery and shipping data to unveil links between supply chains and deforestation. He dives into how technology can monitor and combat forest loss while exploring the role of consumer behavior in this crisis. The conversation also tackles multinational companies' transparency challenges and the emerging tools, like AI, aimed at addressing environmental impacts. Finally, Titley discusses the issue of greenwashing and how AI could enhance the authenticity of corporate sustainability claims.

May 27, 2025 • 41min
Emma Pinchbeck: Will net zero damage the economy?
Emma Pinchbeck, Chief Executive of the UK’s Climate Change Committee, dives into the future of sustainable living. She shares how cutting carbon emissions can reshape daily life in London by 2050, highlighting the rise of electric vehicles and healthier habits. Pinchbeck also critiques the reliance on hydrogen for transportation and discusses the complexities of carbon capture technology. Plus, she emphasizes the role of effective communication in driving climate policy and the necessity of behavioral shifts for lasting change.

26 snips
Mar 25, 2025 • 37min
Kathleen Alexander: Can you make edible oils without land?
Kathleen Alexander, CEO of Savor and a pioneer in sustainable food technology, discusses groundbreaking synthetic alternatives to traditional dairy and vegetable oils. She shares the journey of creating a fat perfect for pastries and explores innovative methods that minimize land use and environmental impact. The conversation delves into the chemistry behind these oils, the significance of branding for market entry, and the surprising notion of using fossil fuels as a food source. A blend of culinary innovation and sustainability challenges awaits!

51 snips
Mar 18, 2025 • 38min
Cat Clifford: Why is nuclear energy back in fashion?
Cat Clifford, Senior Science and Economics Correspondent for Cipher News, dives into the resurgence of nuclear energy amid climate goals. She discusses the innovative small modular reactors and the promising future of nuclear fusion. Cat highlights China's leadership in the nuclear sector and the complex public perceptions stemming from past incidents. The conversation also touches on safety advancements and bipartisan support for nuclear policies, revealing the geopolitical tensions that influence global energy strategies.

Mar 11, 2025 • 35min
Zeke Hausfather: Why do we need carbon removal technology?
Zeke Hausfather, a climate scientist affiliated with Stripe Climate and the IPCC, dives deep into the world of carbon removal technology. He explains the balance of addressing carbon emissions and exploring innovative solutions like direct air capture and advanced rock weathering. Hausfather emphasizes the urgency for investment in these technologies over traditional clean energy approaches and discusses the interplay between AI's energy demands and climate impacts. He also highlights the vital connection between academic research and industry practices for effective climate solutions.

Mar 4, 2025 • 39min
Duncan Walker: Will electric air taxis take off?
Duncan Walker, CEO of Skyports, is at the forefront of revolutionizing urban travel with electric air taxis. He discusses the imminent launch of air taxi services in Dubai and the crucial role of vertiports in this shift. The conversation dives into the challenges and regulations facing the industry, particularly in the UK. Walker also highlights the excitement around electric air travel while addressing public concerns about noise and cost. With the potential to transform both urban and rural transportation, these innovations could reshape our future.

32 snips
Feb 25, 2025 • 39min
Lauren Eatwell: How do you make shipping sustainable?
Lauren Eatwell, Head of Engineering at BAR Technologies, is the innovative mind behind the WindWings project, which retrofits cargo ships with sails to harness wind energy. She discusses the maritime industry's significant contribution to global emissions and the ambitious goal of decarbonization. Key topics include the practical advantages of wind technology for fuel efficiency, the industry's slow adoption of sustainable practices, and the necessity for global collaboration and innovation in reducing shipping's carbon footprint.