LONDON — Plans to reduce the significant environmental effects of aviation took a step forward this week after Rolls-Royce and easyJet said they had carried out the ground test of a jet engine that used hydrogen produced from tidal and wind power.
In a statement this week, aerospace giant Rolls-Royce — not to be confused with Rolls-Royce Motor Cars, which is owned by BMW — described the news as a “milestone” and said it was “the world’s first run of a modern aero engine on hydrogen.”
The test, which was carried out at an outdoor site in the U.K., used a converted regional aircraft engine from London-listed Rolls-Royce.
The hydrogen came from facilities at the European Marine Energy Centre in Orkney, an archipelago in waters north of mainland Scotland. Since its inception in 2003, EMEC has become a major hub for the development of wave and tidal power.
Grant Shapps, the U.K.’s secretary of state for business, energy and industrial strategy, said the test was “an exciting demonstration of how business innovation can transform the way we live our lives.”
“This is a true British success story, with the hydrogen being used to power the jet engine today produced using tidal and wind energy from the Orkney Islands of Scotland,” Shapps added.
Hydrogen’s uses
Described by the International Energy Agency as a “versatile energy carrier,” hydrogen has a diverse range of applications and can be deployed in a wide range of industries.
It can be produced in a number of ways. One method includes electrolysis, with an electric current splitting water into oxygen and hydrogen.
If the electricity used in this process comes from a renewable source such as wind or tidal power, then some call it “green” or “renewable” hydrogen. Today, the majority of hydrogen production is based on fossil fuels.
By contrast, hydrogen ICEs can produce other emissions. “Hydrogen engines release near zero, trace amounts of CO2 … but can produce nitrogen oxides, or NOx,” Cummins, an engine maker, says.
Industry’s aims
The environmental footprint of aviation is considerable, with the World Wildlife Fund describing it as “one of the fastest-growing sources of the greenhouse gas emissions driving global climate change.”
The WWF also says air travel is “currently the most carbon intensive activity an individual can make.”
Faury added that hydrogen planes represented the “ultimate solution” for the mid and long term.
While there is excitement in some quarters about hydrogen planes and their potential, a considerable amount of work needs to be done to commercialize the technology and roll it out on a large scale.
Speaking to CNBC last year, Ryanair CEO Michael O’Leary appeared cautious when it came to the outlook for new and emerging technologies in the sector.
“I think … we should be honest again,” he said. “Certainly, for the next decade … I don’t think you’re going to see any — there’s no technology out there that’s going to replace … carbon, jet aviation.”
“I don’t see the arrival of … hydrogen fuels, I don’t see the arrival of sustainable fuels, I don’t see the arrival of electric propulsion systems, certainly not before 2030,” O’Leary added.
Paris’ bike-share system, Vélib has long been considered one of the shining success stories of urban micromobility. With a massive fleet of over 20,000 pedal and electric-assist bicycles around Paris, the service has helped millions of residents and tourists get around the City of Light without needing a car or scooter. But lately, a growing problem is threatening to knock the wheels off this urban mobility marvel: theft and joyriding.
According to city officials and the service operator, more than 600 Vélib bikes are now going missing every single week. That’s over 30 bikes a day simply vanishing from the system – some stolen outright, others taken on “joy rides” and never returned.
“At the moment we’re missing 3,000 bikes,” explained Sylvain Raifaud, head of the Agemob company that currently operates the Velib system. That’s nearly 15% of over 20,000 Vélib bikes across Paris.
The sticky-fingered culprits aren’t necessarily professional thieves or organized crime rings. Instead, they’re often regular users who treat the shared bikes like disposable toys.
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The city estimates that many people have figured out how to pry the bikes out of the system’s parking docks, unlocking one for a casual cruise and then ditching it somewhere far from a docking station.
Once pried free, the bikes are technically usable for the next 24 hours until their automatic locking feature kicks in. At that point, the bikes are often simply abandoned. Some end up in alleyways. Others get tossed in rivers. A few just disappear completely.
And since the bikes are intended to be parked at their many docking stations around the city, they don’t have GPS chips, further complicating recovery of “liberated” bikes.
The issue started small but has grown into more than an inconvenience – it’s beginning to undermine the entire purpose of the service. With bikes going missing at such a high rate, many Vélib docking stations are left empty, especially during rush hours.
Riders looking for a quick commute or a convenient hop across town are increasingly finding themselves without available bikes, or having to walk long distances to find a functioning one.
That kind of unreliability chips away at user confidence and threatens to drive potential riders back into cars, cabs, or other less sustainable forms of transport at a time when Paris has already made great strides to dramatically reduce car usage in the city.
The losses are financially painful, too. Replacing stolen or vandalized bikes isn’t cheap, and the resources spent on tracking down missing equipment or reinforcing anti-theft measures are stretching thin. Vélib has faced theft and vandalism issues before, especially during its early years, but this latest surge has officials sounding the alarm with renewed urgency.
Officials acknowledge that there’s no easy fix. Paris, like many cities with bike-share systems, walks a fine line between accessibility and accountability. Part of what makes Vélib so successful is its ease of use and widespread availability. But those same features make it vulnerable to misuse – especially when enforcement is limited and the consequences for abuse are minimal.
The timing of the problem is especially unfortunate. In recent years, Paris has seen impressive results in reducing car traffic, expanding bike lanes, and promoting cycling as a key part of its sustainable transport strategy. Vélib is a cornerstone of that plan. But if the system becomes too unreliable, it risks losing the very people it was designed to serve.
Meanwhile, as Parisians increasingly find themselves staring at empty docks, the challenge for the city and Vélib will be to restore confidence in the system without making it harder to use. That means striking the right balance between freedom and responsibility, between open access and protection against abuse.
In a city where cycling is supposed to be the future of mobility, losing thousands of bikes to joyriders and sticky fingers isn’t just frustrating; it’s unsustainable.
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U.S. President Donald Trump and Elon Musk attend a press event in the Oval Office of the White House in Washington, D.C., U.S., May 30, 2025.
Nathan Howard | Reuters
When they lose a significant other, most men do indeed become a “TRAIN WRECK.” Then they pick up the pieces of their lives and start living again — paying attention to their personal grooming, hitting the gym and discovering new hobbies.
What does the world’s richest man do? He starts a political party.
Last weekend, as the United States celebrated its independence from the British in 1776, Elon Musk enshrined his sovereignty from U.S. President Donald Trump by establishing the creatively named “American Party.”
Few details have been revealed, but Musk said the party will focus on “just 2 or 3 Senate seats and 8 to 10 House districts,” and will have legislative discussions “with both parties” — referring to the U.S. Democratic and Republican Parties.
It might be easier to realize Musk’s dream of colonizing Mars than to bridge the political aisle in the U.S. government today.
To be fair, some thought appeared to be behind the move. Musk decided to form the party after holding a poll on X in which 65.4% of respondents voted in favor.
Folks, here’s direct democracy — and the powerful post-separation motivation — in action.
— CNBC’s Erin Doherty contributed to this report.
What you need to know today
And finally…
An investor sits in front of a board showing stock information at a brokerage office in Beijing, China.
US President Donald Trump, right, and Elon Musk, chief executive officer of Tesla Inc., during a news conference in the Oval Office of the White House in Washington, DC, US, on Friday, May 30, 2025.
Francis Chung | Bloomberg | Getty Images
When they find themselves without a significant other, most men finally start living: They pay attention to their personal grooming, hit the gym and discover new hobbies.
What does the world’s richest man do? He starts a political party.
Last weekend, as the United States celebrated its independence from the British in 1776, Elon Musk enshrined his sovereignty from U.S. President Donald Trump by establishing the creatively named “American Party.”
Few details have been revealed, but Musk said the party will focus on “just 2 or 3 Senate seats and 8 to 10 House districts,” and will have legislative discussions “with both parties” — referring to the U.S. Democratic and Republican Parties.
It might be easier to realize Musk’s dream of colonizing Mars than to bridge the political aisle in the U.S. government today.
To be fair, some thought appeared to be behind the move. Musk decided to form the party after holding a poll on X in which 65.4% of respondents voted in favor.
Folks, here’s direct democracy — and the powerful post-separation motivation — in action.
[PRO] Wall Street is growing cautious on European equities. As investors seek shelter from tumult in U.S., the Stoxx 600 index has risen 6.6% year to date. Analysts, however, think the foundations of that growth could be shaky.
And finally…
Ayrton Senna driving the Marlboro McLaren during the Belgian Grand Prix in 1992.
Pascal Rondeau | Hulton Archive | Getty Images
The CEO mindset is shifting. It’s no longer all about winning
CEOs today aren’t just steering companies — they’re navigating a minefield. From geopolitical shocks and economic volatility to rapid shifts in tech and consumer behavior, the playbook for leadership is being rewritten in real time.
In an exclusive interview with CNBC earlier this week, McLaren Racing CEO Zak Brown outlined a leadership approach centered on urgency, momentum and learning from failure.