Closing the Gap with Gwen Holdmann | Energy Transition Stories

In Fairbanks, four trainloads of coal arrive every day to power and heat the University of Alaska campus that's known for its cutting-edge research on integrating renewable energy technologies. Building a brand new coal-fired power plant in the 21st century was, to put it mildly, a controversial decision. But believe me when I tell you—we researched the heck out of it. Today on the show, I'll walk...

Norway is determined to move away from coal and other fossil fuels entirely, but the town of Longyearbyen in the Arctic outpost of Svalbard is literally built around coal and has identified strongly as a coal town for more than 100 years. This year, the last coal mine in Longyearbyen shut down — not because they ran out of coal, but because the country is deeply committed to trying something else,...

On this podcast, we spend a lot of time talking about electricity — how to generate it, store it, and use less of it. But the truth is, the bigger share of our energy use often goes to heating and cooling — the invisible comfort systems that keep us alive in the places we choose to live. Humans are unusual that way. Most species adapt to their environment. We do the opposite — we adapt the environ...

Waste-to-energy systems kill two birds with one stone: they deal with garbage and produce power at the same time. Copenhill in Denmark has been called the coolest power plant in the world, and it's hard to argue with that. It's a place where you can ski down the roof, climb up the side, and then grab coffee under the smokestack — all while the building generates heat and energy for the city.  At l...

The multi-million dollar fighter jets that roar over the local tennis court where I coach the high school team is a daily reminder that Fairbanks is home to one of the most strategically important Air Force bases in the world. And now, Eielson Air Force Base is about to make history on a very different front — testing a first-of-its-kind nuclear microreactor. People: Colonel Michael Mullin, Deputy...

Back in 2019, Congress directed the Department of Defense to find a site and pilot a small nuclear reactor to enhance energy resilience at military installations. That site is Eielson Air Force Base near Fairbanks, Alaska. Recently the Air Force named a developer for the reactor, so we're revisiting the story we told back in Episode 5. In future episodes you'll hear directly from the key people mo...

Water is 800 times denser than air and when large volumes start moving in a single direction with force and purpose, it becomes virtually unstoppable. And that force represents an opportunity to harness the power of water in a way that's different from conventional hydropower. Instead of relying on elevation and gravity, we can capture energy directly from the flow itself. Afterall, the tides are...

Hydropower comes in many forms, though most people still associate it with big dams. In the heyday of dam building, projects like Grand Coulee Dam and Boulder Dam in the American West were monumental efforts. But back then, we didn't fully understand how dams could disrupt ecosystems; now we do, and as a result, large dams have fallen out of favor in many places. And where the U.S. was once the le...

We started our series on solar energy at a small scale. This time, we are going big -- the Al Kharsaah Solar Plant in Qatar is one of the largest solar farms in the world. In this episode, we're going to take a closer look at solar at scale—exploring the limits to scaling up this seemingly unlimited energy source, and the innovations underway today that could define what the solar industry looks l...

This is the first episode in a series about solar energy, and we're starting really small. In Germany, Gwen learned about these compact personal solar kits you can install yourself -- right out of the box. There, they call it balkonkraftwerk, or balcony solar. Of course she had to buy one when she got back from Europe and try it out on her roof in Fairbanks. But is the grid ready for this kind of...

You don't need super high temperatures to harness geothermal energy. Under the right circumstances, a much smaller thermal gradient can be used as well. If we start digging, we're guaranteed to find heat. It's getting that heat to the surface where we can use it without spending more energy than we can actually get out of it -- that's the tricky part. We visit South Africa, Denmark, and upstate Ne...

A look at the extreme edges of geothermal energy. We'll start with the super hot -- actual liquid magma -- chatting with a couple of visionary Icelanders that have some big ideas about the future of geothermal.  People: Hjalti Páll Ingólfsson, Director, GEORG (Geothermal Research Cluster); Eli Gudleifsson, Alaska Center for Energy and Power; Björn Þór Guðmundsson, CEO Krafla Magma Testbed; John Ei...

We cover the basics of geothermal energy before diving in to the more extreme versions of the technology in the next few episodes. And where better to kick off an episode on geothermal than with a mini-tour of Iceland — a country that has arguably made better use of geothermal than anywhere else on earth? In this episode, we'll visit three sites in the southwest near the capital of Reykjavik befor...

Before our towns and homes were lit by electricity, we relied on something called town gas for everything from reading lights to cooking. Eventually, town gas in most places was replaced by natural gas, which burned cleaner. But the switch from town gas to natural gas was not a one to one replacement, and it was not trivial. Because town gas, unlike natural gas, is mostly hydrogen. People: Tony Iz...

Hydrogen is the most abundant element in the universe and is the energy source powering our sun. The idea of a hydrogen economy has been promoted for decades. So what's holding us back? In this episode, I learn how to fill up a hydrogen vehicle in Hawaii and share the amazing story behind the discovery of naturally occuring hydrogen gas reserves in Africa that have energy wildcatters scouring the...

We explore two carbon capture technologies that are exploiting natural geologic processes. But the companies working on these solutions are taking those natural processes and speeding them up a bit -- giving mother nature a little extra push in order to try and slow down climate change. The first is a company called Carbfix in Iceland, which is turning carbon dioxide into stone and storing it unde...

Not every place has the right geologic settings for long-term carbon storage. But Alaska is one – in fact, Cook Inlet is the best tidewater location for storage on the entire west coast of North America. North Dakota is another. And for North Dakota this isn't necessarily so much about mitigating climate change, it's about building a new niche market to offer a service that others are willing to p...

Like much of rural Alaska, the town of Nome relies heavily on imported fuels for heating and power. The cost of heating oil here is well over $7/gallon. That's what incentivizes a lot of Alaska communities to pursue new energy technologies, often well before they are part of the mainstream. Nome was the first community in Alaska to have a commercial solar array, and first to enter into an agreemen...

The U.S. Nuclear Regulatory Commission expects to receive 25 licensing applications in the next five years for a new generation of advanced reactors. But getting any of these designs from the drawing board to reality is going to require overcoming a lot of hurdles and uncertainties. Getting any new technology to market is challenging, but that challenge is even more acute for nuclear because of th...

Nuclear power is different from other energy sources. When we talk about new nuclear projects, it can still bring up strong and sometimes emotional reactions for people -- more so than with other sources of energy, and those opinions are much more divided across the political spectrum than any other technology. How did public perception change as nuclear moved from a technology of war to the energ...

Iceland is a powerhouse when it comes to harnessing the heat and the energy that's pouring up through the tectonic crack that runs diagonally across the island. Icelanders originally got the idea for geothermal district heating from turn-of-the-century Idaho. But since then, the small nation managed to gather best practices from places like Boise, and then improve on them. And now they have the mo...

Iceland is widely regarded as a global leader in clean energy. Not only is their energy sustainable, it's cheap, too. They have some of the most affordable heat and power in the world. But it was literally one of the poorest countries in Europe two generations ago. So, how did Iceland get here? What would they say are the most important choices and investments they made along the way? They share t...

We can start exploring the current energy transition by first stepping back in time to look at the last big one – the one that gave millions of people around the world widespread access to electric power. Rural electrification remains an ongoing process today, particularly in rural and remote areas of the developing world. Getting electricity monumentally changed people's lives. We'll go back to e...

I'm Gwen Holdmann, an energy researcher in Alaska. This podcast is where I share stories from the people I've met and the places I've visited around the world that are at the leading edge of the global energy transition: Geothermal beaches in Iceland, hydrogen-fueled tiki torches in Hawaii, solar-powered villages above the Arctic Circle, and power plants that are capturing their own greenhouse gas...