Climate Confident - Practical Climate Solutions That Cut Emissions

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Caribbean islands pay a steep price for electricity generated from imported diesel. Solar and storage offer an alternative, but cheaper technology alone won't overcome the financing barriers keeping projects and households out.
I speak with David Gumbs, Director of RMI's Global Islands Programme and former CEO of Anguilla's electricity utility, about what volatile fuel costs mean for businesses, government budgets and energy security.
Why can promising renewable projects struggle to attract investors simply because an island is small? We examine Grenada's approach to project finance, community-funded solar in the Dominican Republic, and the difference between clean power and hurricane-resilient power. Kismet: isolated island grids can expose integration challenges that larger electricity networks have more room to absorb.
Listen now to understand which financing, policy and grid decisions could turn abundant renewable resources into affordable, reliable island electricity.
Sign up to Climate Confident+ for deep dive analysis of the major climate and energy stories of the day.
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Podcast subscribers
I'd like to sincerely thank this podcast's amazing subscribers:
Anita Krajnc
Cecilia Skarupa
Ben Gross
Jerry Sweeney
Andreas Werner
Stephen Carroll
Roger Arnold
And remember you too can Subscribe to the Podcast  - it is really easy and hugely important as it will enable me to continue to create more excellent Climate Confident episodes like this one, as well as give you access to the entire back catalog of Climate Confident episodes.

🎤 Looking for a keynote speaker on climate, energy, AI, or sustainability?
I help executive audiences understand the technologies, trends, and decisions shaping the low-carbon transition. 
Download my Speaker Pack: https://tinyurl.com/spkrpck

And a quick note before you go: I’ve started a new Reddit community for serious, evidence-led discussion on climate solutions, clean energy, decarbonisation, policy, technology, and what actually works in practice. 
If you’d like to suggest future guests, challenge ideas from the show, or share climate reports and solutions worth discussing, join us at r/ClimateConfident

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Advanced nuclear could have a lithium isotope problem long before it has a commercial power plant. Promising reactor designs need specialist materials that are barely produced at industrial scale.
John Elling, CEO of Molten Salt Solutions, joins me to explain why isotope separation matters to both advanced fission and fusion. Getting enough of the right lithium, at a price developers can plan around, is an engineering and investment challenge - not simply a procurement exercise.
We explore the surprising reason some fission reactors want to avoid lithium-6 while many fusion designs depend on it. We also examine how material prices can change reactor design, and the dilemma facing suppliers asked to invest in production capacity before customers can commit to buying it.
Listen now to understand what needs to happen between a nuclear breakthrough and a power plant delivering electricity to the grid.
Sign up to Climate Confident+ for deep dive analysis of the major climate and energy stories of the day.
Support the show
Podcast subscribers
I'd like to sincerely thank this podcast's amazing subscribers:
Anita Krajnc
Cecilia Skarupa
Ben Gross
Jerry Sweeney
Andreas Werner
Stephen Carroll
Roger Arnold
And remember you too can Subscribe to the Podcast  - it is really easy and hugely important as it will enable me to continue to create more excellent Climate Confident episodes like this one, as well as give you access to the entire back catalog of Climate Confident episodes.

🎤 Looking for a keynote speaker on climate, energy, AI, or sustainability?
I help executive audiences understand the technologies, trends, and decisions shaping the low-carbon transition. 
Download my Speaker Pack: https://tinyurl.com/spkrpck

And a quick note before you go: I’ve started a new Reddit community for serious, evidence-led discussion on climate solutions, clean energy, decarbonisation, policy, technology, and what actually works in practice. 
If you’d like to suggest future guests, challenge ideas from the show, or share climate reports and solutions worth discussing, join us at r/ClimateConfident

Get in touch - leave me a message
AI data centres are creating an extraordinary new demand for electricity. The harder question is whether clean, firm power can be built quickly enough to meet it, without falling back on gas.
My guest in this episode is Matt Loszak, co-founder and CEO of Aalo Atomics, which is developing small, factory-built nuclear reactors initially for AI data centres. The bet is that nuclear can move from bespoke megaprojects to repeatable manufactured products, cutting deployment time while preserving the reliability these facilities require.
We examine what that shift would actually demand: why standardisation changes nuclear construction, why data centres may provide the high-paying early market needed to bring costs down, and why reaching criticality is very different from proving a commercially viable power plant. We also get into the harder engineering test - operating reliably at high capacity factor, and whether SMRs can scale without recreating the problems of conventional nuclear.
Listen now to hear what factory-built nuclear still has to prove, and why AI’s appetite for power may give it an unusually significant opportunity to do so.
Sign up to Climate Confident+ for deep dive analysis of the major climate and energy stories of the day.
Support the show
Podcast subscribers
I'd like to sincerely thank this podcast's amazing subscribers:
Anita Krajnc
Cecilia Skarupa
Ben Gross
Jerry Sweeney
Andreas Werner
Stephen Carroll
Roger Arnold
And remember you too can Subscribe to the Podcast  - it is really easy and hugely important as it will enable me to continue to create more excellent Climate Confident episodes like this one, as well as give you access to the entire back catalog of Climate Confident episodes.

🎤 Looking for a keynote speaker on climate, energy, AI, or sustainability?
I help executive audiences understand the technologies, trends, and decisions shaping the low-carbon transition. 
Download my Speaker Pack: https://tinyurl.com/spkrpck

And a quick note before you go: I’ve started a new Reddit community for serious, evidence-led discussion on climate solutions, clean energy, decarbonisation, policy, technology, and what actually works in practice. 
If you’d like to suggest future guests, challenge ideas from the show, or share climate reports and solutions worth discussing, join us at r/ClimateConfident

Get in touch - leave me a message
Enhanced rock weathering looks deceptively simple: crush suitable rock, spread it on farmland and let chemistry remove CO₂. The harder question is whether you can prove that removal reliably enough to make the economics work.
I speak with Chris Zair, Director of Partnerships at UNDO, about what happens when enhanced rock weathering moves from controlled trials into real fields. For buyers, investors and policymakers, the stakes are practical: measurement and verification can account for roughly half the cost stack, and weak data can stop credible carbon removal from becoming financeable infrastructure.
We look at why disappearing rock creates an unusual MRV problem, what changes when carbon-credit contracts pay only on delivery, and why having plenty of rock and farmland still does not guarantee scale. We also examine the trade-off between durability, cost and speed - including why particle size can radically alter how quickly CO₂ is removed.
Listen now to understand what is really holding back enhanced rock weathering - and what has to change for carbon removal to become measurable, financeable and repeatable at scale.
Sign up to Climate Confident+ for deep dive analysis of the major climate and energy stories of the day.
Support the show
Podcast subscribers
I'd like to sincerely thank this podcast's amazing subscribers:
Anita Krajnc
Cecilia Skarupa
Ben Gross
Jerry Sweeney
Andreas Werner
Stephen Carroll
Roger Arnold
And remember you too can Subscribe to the Podcast  - it is really easy and hugely important as it will enable me to continue to create more excellent Climate Confident episodes like this one, as well as give you access to the entire back catalog of Climate Confident episodes.

🎤 Looking for a keynote speaker on climate, energy, AI, or sustainability?
I help executive audiences understand the technologies, trends, and decisions shaping the low-carbon transition. 
Download my Speaker Pack: https://tinyurl.com/spkrpck

And a quick note before you go: I’ve started a new Reddit community for serious, evidence-led discussion on climate solutions, clean energy, decarbonisation, policy, technology, and what actually works in practice. 
If you’d like to suggest future guests, challenge ideas from the show, or share climate reports and solutions worth discussing, join us at r/ClimateConfident

Get in touch - leave me a message
For years, renewable natural gas had a basic problem in heavy-duty trucking: it lacked a 15-litre engine capable of doing the work fleets expect from diesel. That barrier is disappearing. The harder question now is whether the economics and infrastructure stack up.
My guest is Scott Brinner, Executive Vice President of RNG Solutions at NoPetro Energy, who works across RNG production, fuelling and fleet deployment. We look at the real decision facing operators: can fuel savings overcome a $70,000–$90,000 truck premium without creating new operational risk?
We examine why high-mileage, return-to-base fleets may be the strongest early fit, what fuelling and maintenance infrastructure can quietly derail adoption, and why the climate case depends on feedstock, methane leakage and lifecycle accounting—not the label on the pump. We also test where RNG belongs alongside battery-electric trucking rather than treating every route as the same problem.
Listen now to understand where renewable natural gas can genuinely work in heavy-duty trucking—and what fleets need to prove before scaling it.
Sign up to Climate Confident+ for deep dive analysis of the major climate and energy stories of the day.
Support the show
Podcast subscribers
I'd like to sincerely thank this podcast's amazing subscribers:
Anita Krajnc
Cecilia Skarupa
Ben Gross
Jerry Sweeney
Andreas Werner
Stephen Carroll
Roger Arnold
And remember you too can Subscribe to the Podcast  - it is really easy and hugely important as it will enable me to continue to create more excellent Climate Confident episodes like this one, as well as give you access to the entire back catalog of Climate Confident episodes.

🎤 Looking for a keynote speaker on climate, energy, AI, or sustainability?
I help executive audiences understand the technologies, trends, and decisions shaping the low-carbon transition. 
Download my Speaker Pack: https://tinyurl.com/spkrpck

And a quick note before you go: I’ve started a new Reddit community for serious, evidence-led discussion on climate solutions, clean energy, decarbonisation, policy, technology, and what actually works in practice. 
If you’d like to suggest future guests, challenge ideas from the show, or share climate reports and solutions worth discussing, join us at r/ClimateConfident