Could Green Hydrogen Revolutionize the Energy Sector?

Episode Summary

Executive Summary: The episode covers two practical economics topics: the real role of green hydrogen in decarbonizing industry and the evolving economics of budget travel in Europe. Adam Tooze argues hydrogen is already essential to industrial production, with green hydrogen needed first to replace dirty existing uses before expanding into steel, chemicals, storage, and eventually transport. The second half explains how rail, hostels, Airbnb, and regional price differences shape cheaper European travel.

Main Topics: Green hydrogen as an industrial necessity (Priority: 5/5): The discussion emphasizes that hydrogen is already widely used in industry, especially as a chemical feedstock, and the central challenge is decarbonizing existing hydrogen production before imagining futuristic uses. Production methods and efficiency barriers (Priority: 5/5): The episode contrasts grey hydrogen made from fossil fuels with green hydrogen made through electrolysis using renewable electricity, highlighting major energy losses, transport costs, and infrastructure challenges. Blue hydrogen and stranded-asset risk (Priority: 4/5): Blue hydrogen is presented as a transitional fossil-fuel-based option with carbon capture, but one that may become obsolete quickly and leave investors with stranded assets. Geopolitics of hydrogen markets (Priority: 4/5): The conversation explores which countries may benefit from the hydrogen transition, including renewable-rich African states, India, China’s electrolyzer dominance, and US subsidy advantages under the Inflation Reduction Act. Budget travel in Europe and the future of flying (Priority: 4/5): The second segment examines low-cost airlines, climate policy, and the uneven viability of budget air travel versus rail for European mobility. Hostels, Airbnb, and regional tourism costs (Priority: 3/5): The hosts discuss why hostels thrive in Europe, how Airbnb affects housing markets, and how Europe’s travel costs vary sharply by region, with Eastern Europe and Albania emerging as cheaper options.

Key Arguments: Hydrogen is not a speculative future fuel alone; it is already a critical input in industrial production, so decarbonization must start by greening existing hydrogen use. Green hydrogen is produced by electrolysis using renewable electricity, but the process is highly energy-intensive and inefficient, making cheap power and better electrolyzers essential. Most current hydrogen is grey, made from natural gas, coal, or oil, and its emissions are comparable to those of a large industrial country. Hydrogen’s strongest near-term case is in hard-to-abate sectors like steel and chemicals, where very high heat is difficult to achieve without combustion. Hydrogen can also serve as an energy-storage medium for intermittent solar and wind power, though conversion and transport losses are significant. Transport applications, especially motor vehicles, are less compelling because battery electric alternatives are often cheaper and more mature. Blue hydrogen may temporarily appeal to fossil-fuel firms, but it risks becoming a stranded asset as green hydrogen costs fall. The countries best positioned for hydrogen may be reshuffled by renewable geography and industrial policy, with China, the US, Morocco, Namibia, and India each holding different advantages. On travel, European rail and budget airlines still offer much cheaper and more flexible options than the US, but cross-border rail integration remains fragmented. Airbnb does raise rents and prices in popular cities, but the episode argues the effect is often smaller than public debate suggests and is best handled through regulation.

Data Points: Global green hydrogen market size (2022): $676 million - Size of the market cited at the start of the hydrogen segment Projected global green hydrogen market size (2027): $7 billion - Forecast market value mentioned in the introduction Hydrogen produced and used globally in 2020: 87 million metric tons - Approximate annual global hydrogen volume already consumed Current market value of hydrogen: $130 billion to $170 billion - Estimated value range of the existing hydrogen market Share of global hydrogen from natural gas: 47% - Grey hydrogen production source mix Share of global hydrogen from coal: 27% - Grey hydrogen production source mix Share of global hydrogen from oil: 22% - Grey hydrogen production source mix Share of global natural gas used to make hydrogen: About 6% - Energy input currently devoted to hydrogen production Share of global coal used to make hydrogen: About 2% - Energy input currently devoted to hydrogen production Share of global hydrogen currently made by electrolysis: 4% - Existing production from electrolysis, not necessarily green Share of global hydrogen that is green in the strict sense: About 1% - Electrolysis powered by renewable electricity Energy lost in electrolysis: 30% to 35% - Efficiency loss in producing hydrogen from water Energy lost in liquefying or converting to carriers like ammonia: 13% to 25% - Additional loss after electrolysis Energy lost in transport: 10% to 12% - Further loss if hydrogen is moved between locations Cost share from energy in green hydrogen: 70% - Energy costs dominate current green hydrogen production costs Potential future hydrogen demand: 200 to 300 million tons - Illustrative scenario for expanded hydrogen use across applications Estimated daily budget for Scandinavia: $150 per day - Highest-cost European travel region mentioned Estimated daily budget for the United Kingdom: $100 per day - Second-highest in the travel cost comparison Estimated daily budget for Western Europe: $80 to $100 per day - General benchmark for popular Western destinations Estimated daily budget for Central Europe: $50 to $80 per day - Mid-range travel costs Estimated daily budget for Eastern Europe: $50 per day - Cheapest broad regional category mentioned Average cost of a 7-day solo trip to Europe from the US: $1,359 - Budget travel benchmark in the second half Barcelona Airbnb impact on rents: 7% increase - Effect found in the most popular areas up to 2020 Barcelona Airbnb impact on real estate prices: 17% increase - Effect found in the most popular areas up to 2020 Effect of a 1% increase in Airbnb listings on rents: 0.018% increase - Cross-city econometric estimate cited in the discussion Typical Airbnb rental limit in Amsterdam: About 6 weeks to 2 months per year - Example of local regulation on short-term rentals Cheapest backpacking guide budget for Albania: About $44 per day - Lower-end estimate for budget travel in Albania Prime Albanian Riviera Airbnb prices: $150 to $300 per night - Shows convergence toward high tourist prices in the most desirable areas Average rating for BetterHelp live sessions: 4.9 out of 5 - Sponsor read in the opening ad BetterHelp client review volume: 1.7 million reviews - Sponsor read metric for platform credibility BetterHelp therapist count: 30,000 therapists - Sponsor read claim about platform scale BetterHelp global users: Over 5 million people - Sponsor read claim about platform reach

Pivotal Quotes: "the essential point that I learned in working on this segment, and that I would like listeners to take away from this whole thing is that hydrogen is already a crucial part of the industrial production system" — Adam Tooze: Explaining why hydrogen matters now, not just in the future "the serious apostles, the serious preachers for hydrogen, the people that you should listen to are the people who tell you this: hydrogen is a second move" — Adam Tooze: Describing the correct sequence for decarbonization: renewables first, hydrogen second "show me an undistorted urban housing market, and well, I'd be very pleased to see it" — Adam Tooze: Discussing Airbnb and the broader claim that housing markets are always shaped by policy and demand

Implications: Hydrogen’s real future is industrial decarbonization, not gimmicky transport uses. Meanwhile, budget travel in Europe is still viable, but climate policy, rail integration, and local regulation are reshaping how people move and stay.