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A commercial plane takes off after sunset from Geneva Airport, Switzerland.
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From the Wright brothers’ historic flight in 1903 to the development of supersonic aircraft, the history of aviation has been driven by technology and ambition.

Now, as the 21st century progresses, the sector continues to show its appetite for innovation and radical design.

Last September, for instance, a hydrogen fuel-cell plane capable of carrying passengers took to the skies over England for its maiden flight.

The same month also saw Airbus release details of three hydrogen-fueled concept planes, with the European aerospace giant claiming they could enter service by the year 2035.

More recently, United Airlines announced it had signed a commercial agreement to purchase aircraft from a firm called Boom Supersonic.

In a statement, United said the Overture aircraft — which is yet to be built — was set to be “optimized to run on 100% sustainable aviation fuel.”

All of the above are linked by a focus on technologies designed to reduce aviation’s environmental footprint. This represents a major task, even if the number of flights last year slumped due to the coronavirus pandemic.

According to the International Energy Agency, carbon dioxide emissions from aviation “have risen rapidly over the past two decades,” hitting almost 1 gigatonne in 2019. This, it notes, equates to “about 2.8% of global CO2 emissions from fossil fuel combustion.”

Elsewhere, the World Wildlife Fund describes aviation as “one of the fastest-growing sources of the greenhouse gas emissions driving global climate change.” It adds that air travel is “currently the most carbon intensive activity an individual can make.”

A variety of solutions

Iain Gray is director of aerospace at the U.K.’s Cranfield University. In a phone interview with CNBC, he described zero carbon as “the top priority” for the industry and sought to emphasize the importance of developing a range of solutions to tackle the challenge.

“The really big technology driver is around the propulsion system,” he explained, “but that doesn’t take away from the importance of new technologies around … new lightweight materials, enhanced carbon composite materials, and the systems itself.”

Expanding on his point, Gray provided an example of why the innovations on planes flying above our heads should not be viewed in isolation. 

“There’s a lot of effort goes into reducing the weight on an aeroplane for it only to spend half an hour circling an airport,” he said.

“So the whole interaction of air traffic management with the aircraft itself is a … very important development and new technologies on airspace management are emerging all the time.”

The power of propulsion

Alongside the development of hydrogen fuel-cell planes there’s also been a lot of discussion around electric propulsion in recent years, with firms such as Volocopter and Lilium developing eVTOL, or electric vertical take-off and landing aircraft.

The key with technologies such as these is the types of journeys to which they can be applied.

“If you look at hydrogen fuel cells and you look at batteries, that really is very much aimed at the smaller aircraft, that’s the sub 1,000 kilometer range,” Cranfield’s Iain Gray said.

“You have to do that in a zero carbon way, there’s no question,” he added. “Is that going to make a big difference to the overall CO2 contributions that aviation makes? No.”

“We need to focus on the longer range flights, flights greater than 1,000 kilometers, flights greater than 3,000 kilometers in particular.”

Fueling change

This focus on long-haul trips will be important in the years ahead, even though they make up a small proportion of flights.  

According to a sustainability briefing from Eurocontrol published earlier this year, “some 6% of flights from European airports were long-haul” in 2020, measuring over 4,000 kilometers (around 2,485 miles) in length.

The intergovernmental organization went on to state that “more than half of European aviation’s CO2 emissions were from this tiny proportion of the overall number of flights.”

This viewpoint was echoed by Jo Dardenne, aviation manager at Transport & Environment, a campaign group headquartered in Brussels.

“We shouldn’t forget that the biggest chunk of aviation emissions are linked to long haul flights because you fly longer, you fly higher,” she told CNBC.

“So all in all you’re producing more CO2 … those long haul flights can only be decarbonized by replacing the kerosene that they’re using.”

It’s on these longer journeys that sustainable aviation fuel could have a significant role to play in the future.

Although the European Union Aviation Safety Agency says there’s “not a single internationally agreed definition” of sustainable aviation fuel, the overarching idea is that it can be used to reduce an aircraft’s emissions.

For its part, Airbus describes SAF as being “made from renewable raw material.” It adds that the most common feedstocks are based on crops or used cooking oil and animal fat.

“Currently, the big challenges of sustainable aviation fuel are producing it in the right volumes that are required, and at the right cost point,” Cranfield’s Gray said.

The provenance of feedstocks used for SAF is also important, he explained. “If what you’re doing … to produce sustainable aviation fuel is transporting fuel right across the world using feedstocks from the other side of the planet, then is it really sustainable?”

“The big effort at the moment is looking at how you can produce sustainable aviation fuels in a …  green way.” This could be fuel from waste or local resources, Gray added.

One type of fuel generating interest is e-kerosene, which also goes by the name of synthetic kerosene. According to a briefing from T&E published in February, e-kerosene is produced by combining carbon dioxide and hydrogen.

“What’s great about it is that it can be dropped into these jets without any modification of the engine and of the technology of the plane,” Dardenne said.  

“It’s a carbon neutral fuel, it’s something that can be easily dropped in,” she added. “The only problem is that it’s very expensive.”

Driving cost down will indeed be key in the years ahead, but organizations like T&E are keen to emphasize the potential environmental benefits of using it.

If the CO2 is “captured from the atmosphere” and hydrogen produced using renewables, T&E says “the combustion of e-kerosene will, apart from some residual emissions, be close to CO2 neutral.”

The future

While technology may be developing, the world also needs to come up with rules and regulations focused on the environmental footprint of air travel. 

Examples of these efforts include the Carbon Offsetting and Reduction Scheme for International Aviation and the European Union including carbon dioxide emissions from aviation in its emissions trading system since the year 2012.

In her interview with CNBC, T&E’s Dardenne stressed the importance of “proper regulation.”

She said: “If you price emissions and pollution effectively, then mandate the use of clean technologies, you send the right signals to investors, private and public, to invest in them.” 

“The clearer the regulatory framework the more certainty you can provide to the market that these technologies will have a future,” she added.

“And that will actually bring added value, financial added value, as well as environmental added value.”

Looking at the bigger picture, she went on to state that “proper regulation” would come via effective carbon pricing and fuel mandates, describing the latter as an obligation to use clean fuels. These were, she argued, “the cornerstone of effective aviation decarbonization strategy.”

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Global energy giant RWE halts US offshore wind because of Trump

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Global energy giant RWE halts US offshore wind because of Trump

Global renewable developer and energy giant RWE has halted its US offshore wind operations “for the time being” because of the “political environment” the Trump administration has created.

RWE, Germany’s biggest electricity producer, said in March that it had dialed back its US offshore wind activities. But now, CEO Marcus Krebber said in a speech transcript, which he’ll deliver at the company’s Annual General Meeting in Essen on April 30, that its US offshore wind business is now closed (but it wasn’t all bad news): 

In the US, where we have stopped our offshore activities for the time being, our business in onshore wind, solar energy, and battery storage has so far been developing very dynamically. At the start of this year, we reached an important milestone when our US generation capacity hit the 10 gigawatt mark. The construction of a further 4 gigawatts is secured.

He went on to say that renewables have created regional value and jobs, but that the company remains “cautious given the political developments.” RWE has introduced more stringent requirements for future US investments:

All necessary federal permits must be in place. Tax credits must be safe harbored and all relevant tariff risks mitigated. In addition, onshore wind and solar projects must have secured offtake at the time of the investment decision. Only if these conditions are met will further investments be possible, given the political environment.

About half of RWE’s installed renewable capacity is in the US, where it’s the third-largest renewable energy company through its subsidiary, RWE Clean Energy. RWE holds the rights to develop US offshore wind projects in New York, Louisiana, and California.

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RWE paid $1.1 billion for the New York lease area in 2022, where it’s meant to develop the 3 gigawatt (GW) Community Offshore Wind with the UK’s National Grid. Community Offshore Wind was projected to come online in the early 2030s and expected to power more than a million homes.

The developer paid $5.6 billion for the Louisiana lease in the Gulf of Mexico in 2023 as the lone bidder for development rights, and the Canopy Offshore Wind project off Northern California was not expected to be completed for another decade.

Read more: Trump admin halts $5 billion NY offshore wind project mid-build


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Trump’s memecoin dinner contest earns insiders $900,000 in two days

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Trump's memecoin dinner contest earns insiders 0,000 in two days

WASHINGTON – President Donald Trump and his allies have raked in nearly $900,000 in trading fees over the past two days from the president’s $TRUMP cryptocurrency token, according to Chainalysis, a blockchain data company. 

The surge came after a Wednesday announcement in which the top 220 holders of the token were promised dinner with the president.

“Have Dinner in Washington, D.C. With President Trump,” reads a message on the front page of the Trump coin’s website. The event, which is black tie optional and hosted at the president’s private club in the Washington area, is scheduled for May 22, with a reception for the top 25 holders. A “VIP White House Tour” will take place the following day, the site says. The website also hosts an active leaderboard displaying the usernames of top buyers.

The $TRUMP memecoin jumped more than 50% on the dinner news, boosting its total market value to $2.7 billion. It was met with fierce criticism from some of Trump’s political opponents who said the move was further evidence that the president was using crypto to enrich himself. Sen. Chris Murphy, D-Conn., a prominent Trump critic, wrote on X that the sale was “the most brazenly corrupt thing a President has ever done. Not close.”

Roughly 80% of the $TRUMP token supply is controlled by the Trump Organization and affiliates, according to the project’s website. Since its launch in January, trading activity has generated about $324.5 million in trading fees for insiders, Chainalysis found. These fees are generated through the token’s built-in mechanism that routes a percentage of each trade to wallets controlled by the project — wallets that, according to the website, are linked to the coin’s creators.

Memecoins, often referred to as meme tokens, are a subset of digital assets that use blockchain technology and derive their value largely from internet culture, memes and social media hype rather than from an underlying utility or asset. The originators of memecoins can make fees when their coins are bought and sold.

They have grown in popularity in recent years as speculative assets, with some coins including dogecoin and fartcoin amassing total market values in excess of $1 billion.

Most of the $TRUMP supply remains locked under a three-year vesting plan, with coins gradually becoming available over time. Lockups like these are meant to protect investors by preventing insiders from cashing out all at once — a scheme commonly known in the crypto world as a “rug pull.” Vesting schedules aim to give retail buyers confidence that early holders won’t overwhelm the market and tank the token’s value.

Still, the dinner contest is being viewed by critics as an unusually explicit attempt to monetize presidential access. 

As CNBC reported Friday, Democratic Sens. Adam Schiff of California and Elizabeth Warren of Massachusetts are urging the U.S. Office of Government Ethics to investigate whether the promotion constitutes “pay to play” corruption.

The White House did not respond to a request for comment. The company behind the memecoin also did not respond to a request for comment.

Delaney Marsco, the director of ethics at the Campaign Legal Center, a nonprofit focused on campaign finance and government accountability, told NBC News the coin and dinner contest amounted to an unprecedented ethics breach — though it is unlikely to be illegal.

“Criminal conflicts of interest statutes don’t apply to the President,” she said. “That has allowed him to go against decades of of norms that every modern president since Carter has adhered to, which is to divest your financial interests, rid yourself of your businesses, and kind of go in to the presidency with a clean financial slate so that no one could accuse you of manipulating policy decisions or using your position in order to enrich yourself.” 

“The fact that he is not barred by the law from having these financial interests like this meme coin allows him to engage in a lot of seemingly corrupt activity. It has the appearance of a pay to play, so the President is apparently selling access to himself,” Marsco added.

Molly White, an independent crypto researcher, told NBC News that the leaderboard only shows top $TRUMP holders — and then only by their chosen screen name, making it difficult to identify who is paying to potentially join the dinner.

Schiff and Warren have cited public reports showing that some $TRUMP investors have ties to foreign exchanges or received funds from crypto platforms banned in the U.S., including Binance.

White also noted that at least one top $TRUMP owner has an account on Binance, a cryptocurrency company that doesn’t allow American users.

Trump was elected with significant help from the cryptocurrency industry, which poured tens of millions of dollars into the 2024 election, outpacing corporate donations from traditional sectors like banking and oil. After opposing digital assets during his first term, Trump pivoted in 2024 to campaign as a champion of cryptocurrency, casting Democrats as hostile to innovation and as advocating for tighter regulation. 

The $TRUMP token itself offers no product or service, according to the project’s website. It is part of a broader push by the Trump family into digital assets, despite the market’s volatility and regulatory risks.

In addition to the $TRUMP and $MELANIA meme coins, the family is backing World Liberty Financial, a decentralized finance venture that has raised $550 million across two token sales since last October. Buyers are barred from reselling their tokens and receive no share of profits — but a Trump-affiliated entity is entitled to 75% of net revenue, including token sale proceeds.

Together, these projects have created new streams of revenue for Trump and his inner circle at a time when regulatory oversight of cryptocurrency has weakened sharply under his administration.

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Drive Electric Earth Month, continues this weekend, get your EV Qs answered

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Drive Electric Earth Month, continues this weekend, get your EV Qs answered

It’s that time of year again, time for events across the country to show off electric vehicles at Drive Electric Earth Month.

Drive Electric Earth Month is an offshoot of Drive Electric Week, a long-running annual tradition hosting meetups mostly in the US, but also occasionally in other countries. It started as Drive Electric Earth Day, but since not every event can happen on the same day, they went ahead and extended it to encompass “Earth Month” events that happen across the month of April. It’s all organized by Plug In America, the Sierra Club, the Electric Vehicle Association, EV Hybrid Noire, and Drive Electric USA.

Events consist of general Earth Day-style community celebrations, EV Ride & Drives where you can test drive several EVs in one place, and opportunities to talk to EV owners and ask them questions about what it’s like to live with an EV, away from the pressure of a dealership.

This month, there are 158 events registered across the US and 1 in Mexico (including one online webinar about things to consider when purchasing an EV).

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Events have been happening all month, but the biggest weekend is this upcoming one, APril 26-27.

One really neat event was the Asheville event, which showcased the resiliency of EVs in an area devastated by Hurricane Helene, which was made more severe by climate change. That event was attended by the Rivian R1T which famously got dragged 100 feet submerged in mud and came out running fine.

But the bulk of the events happened on the weekends surrounding Earth Day, April 22, so there were several last weekend and will be even more this upcoming weekend.

There are plenty of events in the big cities where you’d expect, but Plug In America wanted to highlight a few of the events in smaller places around the country. Here’s a sampling of upcoming events:

  • Big Island EV – Cruise and Picnic in Waimea, HI on April 26, 10am-1pm – EV drivers will congregate in various places around the Big Island (Kona, Waimea, Waikoloa and Hilo), then drive up Saddle Road to the Gil Kahele Recreation Area on Mauna Kea for a potluck and a chance to talk about the experience of owning EVs on the Big Island.
  • Santa Barbara Earth Day 2025 and Green Car Show in Santa Barbara, CA on April 26-27, 11am-8pm – This is part of Santa Barbara’s Earth Day celebration, which routinely attracts 30,000 participants and is one of the longest-running Earth Day celebrations on the planet. The Green Car Show includes ride & drives and an “Owners Corner” where owners can showcase their EVs and attendees can check them out and ask questions.
  • Earth Day’25 – EV’s role in a sustainable future in Queretaro City, Mexico on April 26, 9am-4pm – The sole Mexican event, this is a combined in-person/online seminar at the Querétaro Institute of Technology.
  • Norman Earth Day Festival in Norman, OK on April 27, 12-5pm – Another municipal Earth Day festival, with hands-on activities for kids to learn about the environment. A portion of the parking lot reserved for an EV car show for EV owners who pre-register to show off their vehicles.
  • Oregon Electric Vehicle Association Test Drive & Information Expo in Portland, OR on April 27, 10am-4pm – This one is at Daimler Truck’s North American HQ, and will have several EVs for test drives, owner displays (including DIY gas-to-EV conversions), and keynote presentations by EV experts. They’ll even have a 1914 Detroit Electric EV available for test rides!
  • And, we at Electrek want to give a shoutout to Rove’s EV Drive Days in Santa Ana 10am-3pm April 28 – ROVE is the company behind the “full-service” EV charging concept that we’ve talked about several times here on Electrek, and we like what they’re doing for EV charging. They’ve hosted a few community events, and this is their contribution to Earth Month.

Each event has a different assortment of activities (e.g. test drives won’t be available at every event, generally just the larger ones attended by local dealerships), so be sure to check the events page to see what the plan is for your local event.

These events have offered a great way to connect with owners and see the newest electric vehicle tech, and even get a chance to do test rides and drives in person. Attendees got to hear unfiltered information from actual owners about the benefits and trials of owning EVs, allowing for longer and more genuine (and often more knowledgeable) conversations than one might normally encounter at a dealership.

And if you’re an owner – you can show off your car and answer those questions for interested onlookers.

To view all the events and see what’s happening in your area, you can check out the list of events or the events map. You can also sign up to volunteer at your local events, and if you plan to show off your electric car, you can RSVP on each event page and list the vehicle that you plan to show (or see what other vehicles have already registered).


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