Uploaded December 2025 | Updated September 2026, 2 weeks ago
What if the metals needed to decarbonise the world aren’t in the mountains… but lying on the ocean floor? And what if AI-powered robots can extract them without wrecking ecosystems?
In this episode, I sit down with Oliver Gunasekara, CEO and co-founder of Impossible Metals, to confront one of the most overlooked questions in climate tech: where will the minerals for the energy transition actually come from? With ore grades collapsing on land, supply chains tightening, and geopolitical dependence on China growing, we dig into how deep-sea polymetallic nodules might reshape the global push to net zero.
You’ll hear why 84% of global mining today still serves fossil fuels, and why that structural reality slows decarbonisation far more than most people realise. Oliver explains how autonomous underwater robots can hover above the seabed, detect and avoid marine life using AI, and selectively collect high-grade nodules at 4% metal content — compared to 0.2% in many land deposits. The implications for supply chain resilience, battery affordability, and critical mineral independence are enormous.
We also get into the politics. The West is decades behind China in critical mineral processing, and hesitation may drive more destructive land mining rather than less. You might be surprised to learn how nodules form, why they’re older than the human species, and why their $1 trillion market potential could define the next phase of the clean energy transition. This is a conversation about climate integrity, science, risk, and the choices we can’t postpone.
What’s your take? Let me know below 👇
—
🌍 Listen to more episodes: climateconfidentpodcast.com
🔔 Subscribe for weekly insights
👍 Like, comment, and share if this episode sparked new thinking
⏱️ Timestamps below
Guest: Oliver Gunasekara
Company: Impossible Metals
LinkedIn: linkedin.com/in/gunasekara
⸻
2️⃣ Chapters / Timestamps
00:00 – The metals problem no one wants to face
01:42 – Who is Oliver Gunasekara?
03:55 – Why mining underpins the entire energy transition
06:18 – Ore grades collapse and what it means for net zero
08:42 – Why land-based mining is reaching its limits
12:15 – The EV battery and critical minerals crunch
14:02 – How deep-sea nodules form (and why they matter)
16:40 – Can we mine the seabed without harming ecosystems?
20:58 – AI robotics: selective, low-impact nodule collection
25:30 – Geopolitics: China’s mineral dominance
28:44 – Scaling Impossible Metals’ technology
33:10 – The trillion-dollar market shaping climate action
36:55 – What responsible mining must look like
40:50 – Final thoughts on minerals, ethics, and net-zero timelines
What if the metals needed to decarbonise the world aren’t in the mountains… but lying on the ocean floor? And what if AI-powered robots can extract them without wrecking ecosystems?
In this episode, I sit down with Oliver Gunasekara, CEO and co-founder of Impossible Metals, to confront one of the most overlooked questions in climate tech: where will the minerals for the energy transition actually come from? With ore grades collapsing on land, supply chains tightening, and geopolitical dependence on China growing, we dig into how deep-sea polymetallic nodules might reshape the global push to net zero.
You’ll hear why 84% of global mining today still serves fossil fuels, and why that structural reality slows decarbonisation far more than most people realise. Oliver explains how autonomous underwater robots can hover above the seabed, detect and avoid marine life using AI, and selectively collect high-grade nodules at 4% metal content — compared to 0.2% in many land deposits. The implications for supply chain resilience, battery affordability, and critical mineral independence are enormous.
We also get into the politics. The West is decades behind China in critical mineral processing, and hesitation may drive more destructive land mining rather than less. You might be surprised to learn how nodules form, why they’re older than the human species, and why their $1 trillion market potential could define the next phase of the clean energy transition. This is a conversation about climate integrity, science, risk, and the choices we can’t postpone.
What’s your take? Let me know below 👇
—
🌍 Listen to more episodes: climateconfidentpodcast.com
🔔 Subscribe for weekly insights
👍 Like, comment, and share if this episode sparked new thinking
⏱️ Timestamps below
Guest: Oliver Gunasekara
Company: Impossible Metals
LinkedIn: linkedin.com/in/gunasekara
⸻
2️⃣ Chapters / Timestamps
00:00 – The metals problem no one wants to face
01:42 – Who is Oliver Gunasekara?
03:55 – Why mining underpins the entire energy transition
06:18 – Ore grades collapse and what it means for net zero
08:42 – Why land-based mining is reaching its limits
12:15 – The EV battery and critical minerals crunch
14:02 – How deep-sea nodules form (and why they matter)
16:40 – Can we mine the seabed without harming ecosystems?
20:58 – AI robotics: selective, low-impact nodule collection
25:30 – Geopolitics: China’s mineral dominance
28:44 – Scaling Impossible Metals’ technology
33:10 – The trillion-dollar market shaping climate action
36:55 – What responsible mining must look like
40:50 – Final thoughts on minerals, ethics, and net-zero timelines
