Nuclear fusion breakthrough: Scientists generate more power than used to create reaction
On Tuesday, the head of the Department of Energy and other federal scientific leaders announced that a fusion reaction run at the Lawrence Livermore National Laboratory in California achieved net energy, meaning the reaction generated more energy than was put in to initiate the reaction. It is the first time humankind has achieved this landmark.
Fusion is the way that the sun makes power, but recreating a useful fusion reaction here on earth has eluded scientists for decades. Achieving net positive energy paves the way for fusion to move from a lab science to a usable energy source, although large scale commercialization of fusion could still be decades away.
Fusion is particularly attractive given the increasing urgency of climate change because if it can be commercialized at scale, it produces no carbon emissions, nor does it produce the long-lasting nuclear waste associated with nuclear fission, which is the type of nuclear energy used to make energy today.
The National Ignition Facility target chamber at the Lawrence Livermore National Laboratory is where scientists shoot lasers and watch and measure what happens when those lasers collide on a fuel source. Temperatures of 100 million degrees and pressures extreme enough to compress a target up to 100 times the density of lead are created in this facility.
Photo by Damien Jemison/ Lawrence Livermore National Laboratory
“Monday, December 5, 2022 was an important day in science,” Jill Hruby, the National Nuclear Security Administration Administrator, said at a press conference announcing the news on Tuesday in Washington D.C. “Reaching ignition in a controlled fusion experiment is an achievement that has come after more than 60 years of global research, development, engineering and experimentation.”
Reaching ignition means the fusion experiment produced more energy from fusion than the laser energy that used to drive the reaction. Since the experiment, the team has been analyzing data to be able to make this official announcement.
“This is important. Earlier results were records, but not yet producing more energy out than was put in,” Andrew Holland, the CEO of the industry’s trade group, the Fusion Industry Association, told CNBC. “For the first time on Earth, scientists have confirmed a fusion energy experiment released more power than it takes to initiate, proving the physical basis for fusion energy. This will lead fusion to be a safe and sustainable energy source in the near future.”
In the experiment on Dec. 5, about two megajoules (a unit of energy) went into the reaction and about three megajoules came out, said Marvin Adams, Deputy Administrator for Defense Programs at the National Nuclear Security Administration. “A gain of 1.5,” Adams said.
For the experiment, super high powered lasers are all directed at a very tiny fuel target at the National Ignition Facility at the Lawrence Livermore National Laboratory. “During experiments, 192 high energy lasers converge on a target about the size of a peppercorn heating a capsule of deuterium and tritium to over 3 million degrees Celsius and briefly simulating the conditions of a star,” Hruby said.
The main mission of the National Lab is studying nuclear power for use in national defense, and this nuclear fusion research is part of an effort established in 1996 by then President Clinton to maintain confidence in the safety of nuclear weapons stockpiles without full-scale nuclear testing.
But this discovery has massive implications for clean energy, too. In addition to the national security work, “we have taken the first tentative steps towards a clean energy source that could revolutionize the world,” Hruby said.
While this scientific breakthrough that is being celebrated at the highest levels of government, it will be many years before fusion power plants are likely to provide clean abundant energy.
“This is one igniting capsule, one time. And to realize commercial fusion energy, you have to do many things. You have to be able to produce many, many fusion ignition events per minute,” Kim Budil, the director of the Lawrence Livermore Lab, said on Tuesday.
“You have to have a robust system of drivers to enable that. So, you know, probably decades. Not six decades, I don’t think. Not five decades, which is what we used to say. I think it’s moving into the foreground and probably, with concerted effort and investment, a few decades of research on the underlying technologies could put us in a position to build a power plant.”
Omar A. Hurricane, Chief Scientist for the Inertial Confinement Fusion Program at Lawrence Livermore, explained, “What remains to be done from here is largely engineering, of increasing the laser energy efficiency and increasing the target energy gain with further target optimizations.”
Hurricane added, “This new result does indeed bring commercial fusion closer, as it demonstrates that there are no fundamental physics obstacles. It is starting to feel like we are entering the ‘Fusion Age.'”
One step forward in the ‘Fusion Age’
Interest in fusion has increased dramatically in recent years as concerns about climate change and energy security have become more acute.
More than 90 nuclear power reactors currently operate in the United States, but those nuclear reactors employ nuclear fission, which is when a neutron smashes into a larger atom, causing it to split into two smaller atoms and releasing a lot of energy. Nuclear fission reactions do not release any carbon dioxide emissions and therefore are considered clean energy, according to the U.S. Department of Energy.
The United States got approximately 19 percent of its utility-scale electricity generation from those nuclear power plants in 2021, according to the U.S. Energy Information Administration, and the energy from nuclear fission reactors represents half of the clean power generated in the United States, according to the Department of Energy.
However, those reactors generate long-lasting nuclear radioactive waste, and most countries, including the United States, currently have no long-term storage facilities for that waste. Efforts to build a permanent, underground geologic storage facility for nuclear waste have thus far been stymied in the United States.
Fusion happens when two atoms slam together to form a heavier atom, releasing huge amounts of energy without generating carbon dioxide emissions or long-lasting nuclear waste. But it’s proven extremely challenging to sustain a fusion reaction here on earth, and scientists have been trying for decades. In particular, it requires massive amounts of energy to generate fusion on reactions, and until this experiment, nobody had demonstrated the ability to get more energy out of the reaction than it takes to power it.
“Scientists have struggled to show that fusion can release more energy out than is put in since the 1950s,” plasma physicist Arthur Turrell told CNBC.
“During those decades, every time anyone has asked for funding for developing fusion power, the response has always been ‘first, you must show that it works in principle,'” said Turrell, who is also the author of The Star Builders. “That is, you must show that a fusion experiment can produce more energy than it uses. The researchers at Lawrence Livermore have done this for the first time ever.”
Fusion is already a hot space for climate and energy investors — so far, investors have poured almost $5 billion in investment into private fusion energy startups, according to the Fusion Industry Association, and more than half of that has been since since the second quarter of 2021.
“Everyone in the laser fusion (or inertial confinement fusion) community has been focused on getting to more energy out than in on a single experiment, because that is the key to showing the proof of principle and unlocking further investment and interest,” Turrell told CNBC.
Indeed, the private fusion industry is seeing this as a win.
“Now, the privately funded fusion industry will take the next steps, turning experimental results like this into a viable source of clean, safe energy,” Holland told CNBC. “In short, this will show the world that fusion is not science fiction: it will soon be a viable source of energy. Of course there are still many steps between these experimental results and fusion power plants, but this is an important milestone that brings us closer to the day when fusion will provide the world with clean, safe, and abundant energy.”
A Xiaomi store in Shanghai, China, on March 16, 2025.
Qilai Shen/Bloomberg | Bloomberg | Getty Images
Chinese electric carmakers Xiaomi, Xpeng and Leapmotor each delivered nearly 30,000 or more cars in March, roughly twice several of their fellow startup competitors.
It’s a sign of how some automakers are pulling ahead, while BYD remains the market leader by far.
Xiaomi delivered a record number of electric vehicles in March, exceeding 29,000 units, the company announced on social media. That topped its prior run of delivering more than 20,000 vehicles in each of the past five months.
The SU7, Xiaomi’s flagship model, was involved in a crash on a highway on Tuesday that left three dead. The automaker on Tuesday afternoon released a statement on Chinese social media that the vehicle was in navigation on autopilot mode before the accident.
Based on preliminary information, the road was obstructed because of construction. The driver took control of the car but collided with construction infrastructure. Xiaomi added in the release that investigations were underway.
That came two weeks after the automaker announced on March 18 its goal to deliver 350,000 vehicles this year. There are also talks of the automaker expanding its second EV factory in Beijing to meet demand, Bloomberg reported on March 18. Xiaomi did not immediately respond to CNBC’s request for comment.
Its competitor Xpeng in March delivered 33,205 vehicles, the fifth consecutive month it has delivered over 30,000 units per month and reflecting a 268% surge in deliveries from the same month last year. March is also the fifth consecutive month the company has delivered over 15,000 units of the Mona M03.
Leapmotor delivered 37,095 vehicles, reflecting a 154% year-over-year growth. The Stellantis-owned automaker last month launched U.K. sales of two electric vehicle models, the T03 and the C10.
Li Auto delivered 36,674 vehicles in March, a 26.5% year-over-year increase, but fewer than every month in the second half of 2024. The company’s cars had gained early traction with Chinese consumers since most come with a fuel tank for charging the vehicle’s battery, reducing anxiety about driving range.
BYD sold 371,419 passenger vehicles in March, reflecting a year-over-year growth of 57.9%. Its overseas sales volume also hit a record high of 72,723 units in March.
In the same month, the automaker unveiled its “Super e-Platform” technology, which boasts 400 kilometers (roughly 249 miles) of range with five minutes of charging. The company in February also announced that it was integrating DeepSeek artificial intelligence to develop “DiPilot,” its advanced driver-assistance system.
Across the board, major companies across China’s electric car industry reported deliveries rose last month, indicating a pick-up in demand from the seasonally soft first two months of the year.
U.S. automaker Tesla sold 78,828 electric vehicles in China in March, marking a 11.5% year-over-year decline in growth.
Other Chinese carmakers saw growth in deliveries but some still struggled to break through the 20,000-unit mark.
Nio delivered 15,039 vehicles, a 26.7% year-over-year growth, but well below the number of cars delivered in the months of May to December last year. Nio-owned Onvo, which markets its electric vehicles as family-oriented, in March recorded 15,039 units in deliveries.
Geely-owned Zeekr delivered 15,422 vehicles in March, increasing by 18.5% year over year. The company last month announced its rollout of free advanced driver-assistance technology to local customers in a bid to compete in the market.
Aito, as of April 2, has not published its delivery numbers for March. The automaker, which uses Huawei tech in its vehicles, on social media had reported monthly deliveries of 34,987 and 21,517 in January and February, respectively.
Quarterly performance
On a first-quarter basis, BYD remained in the lead with 986,098 vehicles sold. The automaker, which overtook Tesla in annual sales last year, surpassed the U.S. EV giant in battery electric vehicles sales this quarter.
Tesla sold 172,754 vehicles in China in the first quarter this year, according to monthly delivery numbers published by the China Passenger Car Association.
Xpeng also reported strong growth, with a total of 94,008 vehicles delivered in the quarter ending in March, reflecting a 331% year-over-year growth.
Leapmotor saw quarterly deliveries more than double to 87,552 units from 33,410 units the same period in 2024, according to publicly available numbers the company published.
However, Li Auto and Nio reported weaker growth than their competitors in the first quarter of the year.
Nio saw 42,094 vehicles delivered in the three months ended March 2025, an increase of 40.1% year over year. Li Auto saw a slower year-over-year growth of 15.5%, with a total of 92,864 vehicles delivered.
A driver for an independent contractor to FedEx delivers packages on Cyber Monday in New York, US, on Monday, Nov. 27, 2023.
Stephanie Keith | Bloomberg | Getty Images
President Donald Trump on Wednesday signed an executive order shutting the de minimis trade loophole, effective May 2.
Trump in February abruptly ended the de minimis trade exemption, which allows shipments worth less than $800 to enter the U.S. duty-free. The order overwhelmed U.S. Customs and Border Protection employees and caused the U.S. Postal Service to temporarily halt packages from China and Hong Kong. Within days of its announcement, Trump reversed course and delayed the cancellation of the provision.
Wednesday’s announcement, which came alongside a set of sweeping new tariffs, gives customs officials, retailers and logistics companies more time to prepare. Goods that qualify under the de minimis exemption will be subject to a duty of either 30% of their value, or $25 per item. That rate will increase to $50 per item on June 1, the White House said.
Use of the de minimis provision has exploded in recent years as shoppers flock to Chinese e-commerce companies Temu and Shein, which offer ultra-low cost apparel, electronics and other items. The U.S. Customs and Border Protection has said it processed more than 1.3 billion de minimis shipments in 2024, up from over 1 billion shipments in 2023.
Critics of the provision say it provides an unfair advantage to Chinese e-commerce companies and creates an influx of packages that are “subject to minimal documentation and inspection,” raising concerns around counterfeit and unsafe goods.
The Trump administration has sought to close the loophole over concerns that it facilitates shipments of fentanyl and other illicit substances on the claims that the packages are less likely to be inspected by customs agents.
Temu and Shein have taken steps to grow their operations in the U.S. as the de minimis loophole has come under greater scrutiny. After onboarding sellers with inventory in U.S. warehouses, Temu recently began steering shoppers to those items on its website, allowing it to speed up deliveries. Shein opened distribution centers in states including Illinois and California in 2022, and a supply chain hub in Seattle last year.
WATCH: President Trump signs executive orders for reciprocal tariffs
Apple CEO Tim Cook, center, watches during the inauguration ceremonies for President Donald Trump, right, and Vice President JD Vance, left, in the rotunda of the U.S. Capitol in Washington, Jan. 20, 2025.
Shawn Thew | Afp | Getty Images
Apple slid more than 6% in late trading Wednesday and led a broader decline in tech stocks after President Donald Trump announced new tariffs of between 10% and 49% on imported goods.
The majority of Apple’s revenue comes from devices manufactured primarily in China and a handful of other Asian countries. Nvidia, which manufactures new chips in Taiwan and assembles its artificial intelligence systems in Mexico and elsewhere, fell about 4%, while electric vehicle company Tesla dropped 4.5%.
Across the rest of the megacap universe, Alphabet, Amazon and Meta all dropped between 2.5% and 5%, and Microsoft was down by almost 2%.
If Apple’s postmarket loss is matched in regular trading Thursday, it would be the steepest decline for the stock since September 2020.
Trump on Wednesday afternoon said the new taxes on imported goods would be a “declaration of economic independence” for the country. He announced a 10% blanket tariff on all imports, and higher duties for specific countries, including 34% for China, 20% for European nations, and 24% for Japanese imports, based on what tariffs they charge on U.S. exports, Trump said.
“We will supercharge our domestic industrial base, we will pry open foreign markets and break down foreign trade barriers,” Trump said during his speech. “Ultimately, more production at home will mean stronger competition and lower prices for consumers.”
Stocks broadly got hit by Trump’s announcements. An exchange-traded fund tracking the S&P 500 slid 2.8%, while an ETF following the Nasdaq 100 lost more than 3%.
During his speech, Trump praised Apple, Meta, and Nvidia for spending money and investing in the United States.
“Apple is going to spend $500 billion, they never spent money like that here,” Trump said. “They’re going to build their plants here.”
The Nasdaq just wrapped up its worst quarter since 2022, dropping 10% in the first three months of the year, though the tech-heavy index rose in each of the first two days of the second quarter.
WATCH: President Trump signs executive orders for reciprocal tariffs
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