Can we have guilt-free flying?

David, Sara, and Ed chat with Sebastian Eastham, associate professor of sustainable aviation at Imperial College London, about the climate impacts of aviation and what we can actually do about it.

The conversation covers immediate levers like contrail avoidance and operational changes that don't require waiting decades for new tech—plus the real potential (and limitations) of sustainable aviation fuels.

It's a lively and at times blunt conversation, with sharp audience questions and limited patience for climate cosplay. You'll get the cosplay bit once you listen...

🎙️ TIMESTAMPS
00:18 - Introduction
01:15 - Webinar Start
46:00 - Audience Q&A

🔗 LINKS
Full show notes
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About Our Guest

Seb Eastham is the Associate Professor for Sustainable Aviation at Imperial College London. An atmospheric scientist and aeronautical engineer, he seeks to understand what the true environmental impacts of aerospace activity are and what we can do about them. He develops and applies novel numerical models of the atmosphere, ranging from the scale of a single exhaust plume up to the global Earth system, to provide new understanding of those impacts and guide the development of new solutions to support a growing and sustainable aerospace sector. One of his current focus areas is to find robust strategies to reduce (or eliminate) the climate impacts of condensation trails, currently thought to be responsible for up to half of aviation's contributions to climate change.

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Produced by Bespoke Podcasts

You asked — David, Sara, and Ed answered.

We're wrapping up the year with our annual Ask EvC Anything episode, touching on topics that pair well with New Year's bubbly: We talk about whether Canada’s climate targets are quietly slipping out of reach, the practicalities and prospects of direct air capture, what a net zero electricity grid in Alberta might actually look like by 2050, whether shiny new materials like metal organic frameworks are breakthrough solutions or just the latest carbon hype cycle, and why we call the show Energy vs Climate.

References & Show Notes available on episode page.

About Your Co-Hosts:

David Keith is Professor and Founding Faculty Director, Climate Systems Engineering Initiative at the University of Chicago. He is the founder of Carbon Engineering and was formerly a professor at Harvard University and the University of Calgary. He splits his time between Canmore and Chicago.

Sara Hastings-Simon studies energy transitions at the intersection of policy, business, and technology. She’s a policy wonk, a physicist turned management consultant, and a professor at the University of Calgary where she teaches in the Energy Science program, and co-leads the Net Zero Electricity Research Initiative. She has a particular interest in the mid-transition.

Ed Whittingham isn’t a physicist but is a passionate environmental professional. He is the founder of Advance Carbon Removal, a coalition advancing demand side solutions for carbon removal in Canada. He is also the former CEO of the Pembina Institute, Canada’s widely respected energy/environment NGO. His op-eds have been published in newspapers and magazines across Canada and internationally.

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Energy vs Climate relies on the support of our generous listeners
Donate to keep EvC going.

Produced by Amit Tandon & Bespoke Podcasts

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A look back at the biggest energy stories of 2025 and some crystal ball gazing about what to watch for in 2026.

David, Sara and Ed chat with Robbie Orvis, Senior Director of Modeling & Analysis at Energy Innovation, an American Think Tank.

The show was set up to do two things: First, to sort out what genuinely shifted in 2025 and what didn't. Second, to build a 2026 energy and climate watch list that helps separate real transition signals from the noise and the hype.

It's a lively conversation with great audience questions - a sign that people are trying to make sense of a confusing year.

References & notes available on episode page.

About Our Guest:

Robbie Orvis is Senior Director, Modeling & Analysis at Energy Innovation. As a specialist in energy and climate policy, Robbie routinely works with federal and state policymakers in the U.S. as well as international policymakers to analyze legislation and regulation and to provide insights on how to achieve climate goals. He has helped develop and deploy Energy Policy Simulator models in more than a dozen countries, including Canada, China, India, Indonesia, Mexico, Saudi Arabia, and the United States, and to analyze decarbonization pathways in each region.

Robbie is the lead author of Designing Climate Solutions: A Policy Guide for Low-Carbon Energy and frequently provides insights to decision-makers on how to design policies to achieve deep decarbonization. His research is regularly cited in the nation’s top news outlets, including the New York Times, the Washington Post, Politico, Bloomberg, and the

Send us a text (if you'd like a response, please include your email)

Energy vs Climate relies on the support of our generous listeners
Donate to keep EvC going.

Produced by Amit Tandon & Bespoke Podcasts

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Energy vs Climate Podcast
www.energyvsclimate.com

Contact us at info@energyvsclimate.com

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