Hydrogen
Go big or start small: Picking the right scale for green hydrogen
Startups Electric Hydrogen and Ohmium are both building gigawatt-scale factories. But the electrolyzers they’re making come in very different sizes.
By Jeff St. John .
Hydrogen
Green steel
Chart: Steelmaking is starting to go electric
The majority of newly announced steel capacity in 2023 planned to use lower-emissions electric arc furnaces, but the dirty industry has a way to go to clean up.
By Dan McCarthy, Carrie Klein .
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Hydrogen
The power used to make green hydrogen must be tracked down to the hour
Big fossil incumbents claim that hourly accounting for hydrogen tax credits is too complicated — but plenty of startups and nonprofits are already doing it today.By Jeff St. John .
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Hydrogen
Is cheap, clean hydrogen possible? The 'green hydrogen' battle, continued
Big oil and energy companies say strict rules for hydrogen tax credits could kill a nascent industry. Clean-energy advocates say that's dead wrong.By Jeff St. John .
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Hydrogen
The great 'green hydrogen' battle
Tens of billions in federal tax credits could build a vital low-carbon hydrogen industry — or increase carbon emissions. We tackle the complexities in a series.By Jeff St. John .
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Hydrogen
Test shows hydrogen blending slightly reduces gas power plant emissions
The hydrogen revolution isn’t here quite yet — but now we know what happens when a certain type of gas plant burns a small amount of hydrogen.By Julian Spector .
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Air travel
A hydrogen-powered airplane just made a record-setting test flight
Startup Universal Hydrogen says it successfully flew a 40-seat passenger plane powered mainly by hydrogen during a test flight in Washington.By Maria Gallucci .
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Podcast
What hydrogen leaks mean for the climate
Leaked hydrogen may have more atmospheric warming potential than previously thought. Does that change how we should use hydrogen in the energy transition?PlayBy Shayle Kann . 44 min .
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Hydrogen
This utility is blending hydrogen into fossil gas. Can it scale?
Some households in Minnesota have been using a gas blend with 5% hydrogen to cook and heat their homes. Results have been positive so far.By Frank Jossi .
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Air travel
Hydrogen-powered aviation reaches milestone with ZeroAvia's flight
The California startup's 19-seat hydrogen-electric prototype plane successfully completed a short test flight as efforts to curb air-travel emissions scale up.By Maria Gallucci .
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Hydrogen
Will new US incentives for 'green' hydrogen actually reduce emissions?
The Inflation Reduction Act steers billions to boost green hydrogen, but unless carefully monitored, that money could spur an increase in climate pollution.By Emily Pontecorvo .
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