Connect with us

Sustainable Energy

Soda cans can split seawater sustainably to free up green hydrogen

Engineers at MIT use seawater in addition to recycled aluminum from soda cans, to produce low-carbon hydrogen at scale.

Published

on

Hydrogen FOOTPRINT 01 PRESS 0 jpeg
An aluminum-powered electric vehicle, pictured here. Credit: Courtesy of the researchers/MIT

Engineers at MIT have unveiled a potentially game-changing method to produce hydrogen that could drastically reduce the carbon footprint associated with the fuel’s production — a critical step in realizing hydrogen’s promise as a clean energy solution.

Their research, published in the peer-reviewed journal, Cell Reports Sustainability, combines seawater, recycled aluminum from soda cans, and a rare-metal alloy to generate hydrogen with a significantly lower environmental impact.

A full life-cycle analysis by the research team shows the process emits just 1.45 kilograms of carbon dioxide per kilogram of hydrogen produced — a dramatic drop from the 11 kilograms typically emitted by fossil-fuel-based methods.

“This work highlights aluminum’s potential as a clean energy source and offers a scalable pathway for low-emission hydrogen deployment in transportation and remote energy systems,” Aly Kombargi, the paper’s lead author said in a media statement.

A mechanical engineer, Dr. Kombargi had received their doctoral degree fairly recently. Their fellow coauthors include MIT researchers, Brooke Bao and Enoch Ellis. Whereas Douglas Hart, the professor in mechanical engineering, was cited as senior author.

A Clean Cycle

The MIT team first made headlines last year when they demonstrated a lab-scale reaction that turned seawater and aluminum treated with gallium-indium into hydrogen gas. The novelty lies in how the alloy strips aluminum of its protective oxide layer, allowing it to react with water and produce pure hydrogen. Crucially, the salt in seawater helps the gallium-indium alloy to precipitate out and be reused, adding to the process’s sustainability.

To evaluate its real-world viability, the researchers conducted a cradle-to-grave analysis of the process — from sourcing recycled aluminum to transporting the resulting hydrogen. They used Earthster, a life-cycle assessment platform, to calculate emissions and economic costs across various scenarios.

Their lowest-emission scenario relies on secondary (recycled) aluminum and readily available seawater, producing hydrogen at around $9 per kilogram — a price that matches other emerging green hydrogen technologies powered by solar or wind.

A New Model for Hydrogen Infrastructure

Unlike traditional hydrogen production, which requires complex storage and transport infrastructure, the MIT method could simplify the supply chain.

In the envisioned commercial model, aluminum pellets treated with gallium-indium would be transported — rather than the hydrogen itself — to fueling stations near coastal areas. There, the pellets would be combined with seawater to generate hydrogen on demand.

This approach not only sidesteps the risks of transporting volatile hydrogen gas, but also produces a potentially valuable byproduct: boehmite, an aluminum-based mineral used in semiconductors and industrial materials. Selling this byproduct could further reduce production costs.

“There are a lot of things to consider,” Kombargi noted, “but the process works — which is the most exciting part. And we show that it can be environmentally sustainable.”

Electric Bikes and Beyond

The team has already created a prototype reactor, about the size of a water bottle, capable of generating enough hydrogen to power an electric bike for hours. They have also demonstrated the system’s capacity to fuel a small car and are exploring underwater applications, including powering boats or autonomous submersibles using surrounding seawater.

As nations race to decarbonize energy systems, this MIT breakthrough points to a novel, scalable solution — one that turns common materials into a clean fuel source and may help bridge the gap to a hydrogen-powered future.

Climate

Japan’s US LNG Trade Leaves Asia With Emissions Equal to 17 Coal Plants

Japan US LNG trade generated lifecycle emissions equal to about 17 coal plants in a year, according to a new analysis, raising concerns about Asia’s growing dependence on imported gas.

Published

on

Japan US LNG trade generated lifecycle emissions equal to about 17 coal plants in a year, according to a new analysis
Image credit/Tom Fisk/Pexels

As Japan expands its role as a global gas trader, a new analysis raises questions about whether Asia is importing energy security—or future climate liabilities. Japan US LNG trade generated lifecycle emissions equal to about 17 coal plants in a year, raising concerns about Asia’s growing dependence on imported gas.

The liquefied natural gas (LNG) cargoes that Japan resold across Asia over the past five years generated greenhouse gas emissions equivalent to running about 17 coal-fired power plants for a year, according to a new analysis by Zero Carbon Analytics.

The finding comes at a time when several Asian economies are turning to LNG as a bridge fuel in their energy transition strategies, while governments simultaneously pledge to cut emissions and expand renewable energy.

According to the analysis, Japan resold 16.5 billion kilograms of US-produced LNG to nine Asian countries between 2020 and 2025. Across the fuel’s lifecycle—from extraction and liquefaction in the United States to shipping, regasification and combustion in Asia—those sales generated an estimated 63.5 billion kilograms of carbon dioxide emissions.

The report highlights a little-discussed aspect of Asia’s gas trade: Japan is increasingly acting as a middleman in the global LNG market.

Japan’s US LNG Trade–Japan Now Resells More US LNG Than It Uses

Japan remains one of the world’s largest LNG importers, but its domestic demand for gas has been declining.

The analysis found that between 2021 and 2025, Japan sold 77 percent more US LNG to other countries than it imported for its own domestic consumption.

In 2024, Japan ranked as the world’s second-largest LNG trader. While Europe remained the largest destination for Japanese LNG resales, nearly one-third of those transactions were directed to Asian markets, including South Korea, China, India, Taiwan, Thailand, Singapore, Bangladesh, Pakistan and Malaysia.

Three of Japan’s top ten LNG resale destinations were Asian economies: South Korea, China and India.

The numbers reflect a broader shift in regional energy markets. Countries seeking alternatives to coal have increasingly turned to LNG, often presenting gas as a cleaner transition fuel. Yet critics argue that this framing overlooks emissions generated throughout the fuel supply chain.

The Methane Problem

Natural gas is composed primarily of methane, a greenhouse gas that has far greater warming potential than carbon dioxide in the short term.

According to the International Energy Agency’s 2026 Global Methane Tracker, methane emissions from fossil fuel operations remain near record levels globally.

The Zero Carbon Analytics analysis estimates that roughly 30 percent of total LNG lifecycle emissions arise from methane released during extraction, processing and transportation.

Methane can trap around 80 times more heat than carbon dioxide during the first two decades after it enters the atmosphere, making leakage a critical concern for climate scientists.

The report’s emissions calculations include every stage of the LNG supply chain rather than focusing solely on combustion emissions at power plants.

Energy Security or Fossil Fuel Lock-In?

The findings arrive amid renewed concerns over energy security following instability in the Middle East and uncertainty surrounding global gas supplies.

Several Asian economies, including Thailand, Vietnam and the Philippines, have expanded LNG imports in recent years to diversify their energy systems. However, the same dependence has exposed them to volatile international fuel prices.

Yu Sun Chin, Asia Regional Researcher at Zero Carbon Analytics, said the growing trade has implications beyond emissions.

“Japan’s growing role as an LNG trader has significant implications for Asia, which is absorbing close to a third of Japan’s excess supplies. Our calculations of the full lifecycle emissions of these LNG resales highlight the risk they pose to a region already vulnerable to extreme weather and other climate impacts. Rather than increasing reliance on gas as a ‘transition fuel’, transitioning to renewables offers Asia a clearer route to a clean and secure energy future.”

The concern is not merely about current emissions. Energy analysts warn that investments in LNG terminals, pipelines and related infrastructure could lock countries into fossil fuel consumption for decades.

Sam Reynolds, LNG and Gas Research Lead for Asia at the Institute for Energy Economics and Financial Analysis (IEEFA), noted that Japanese companies are increasingly looking abroad as domestic demand declines.

“As Japan’s own LNG demand continues to decline, Japanese companies are becoming increasingly active traders of the fuel to other countries. At the same time, public and private financiers in Japan are investing in downstream infrastructure to stimulate demand and secure long-term customers.”

He added that such investments could leave emerging economies dependent on “a volatile, expensive fuel source for decades” while delaying renewable energy deployment.

Asia’s Climate Challenge

Asia is simultaneously one of the world’s fastest-growing energy markets and one of the regions most vulnerable to climate impacts.

From deadly heatwaves in South Asia to flooding in China and stronger tropical cyclones across Southeast Asia, the region is already experiencing the consequences of rising temperatures.

Climate scientists estimate that global emissions must nearly halve within this decade to keep the Paris Agreement’s 1.5°C goal within reach.

Against that backdrop, environmental groups argue that expanding LNG infrastructure risks undermining climate commitments.

Shruti Shukla, Senior Advocate for International Energy at the Natural Resources Defense Council (NRDC), said the region faces a strategic choice.

“Japan has long positioned itself as a regional energy and economic leader in Asia. That leadership should help accelerate a resilient clean energy transition across the region, not deepen dependence on another generation of imported fossil fuels.”

She warned that growing LNG imports expose countries to methane emissions, volatile fuel markets and costly infrastructure that could become obsolete as renewable technologies become cheaper.

The Economic Risks

The debate extends beyond climate concerns.

Researchers increasingly point to the possibility that LNG infrastructure built today may become stranded assets before the end of its expected lifespan.

Nawaphat Junkrajang, senior researcher at Climate Finance Network Thailand, cited research suggesting that nearly half of Thailand’s operating and proposed LNG terminal capacity could become economically unviable under the country’s climate commitments.

“Each additional resale cargo is not energy security. It is one more step into a lock-in the transition will eventually have to unwind,” he said.

Bangladesh faces similar concerns.

Dr Khondaker Golam Moazzem, Research Director at the Centre for Policy Dialogue, said new energy agreements and infrastructure investments could deepen dependence on imported LNG while narrowing opportunities for renewable energy investment.

A Growing Regional Debate

The analysis arrives as governments across Asia reassess their energy pathways.

Supporters of LNG argue that gas provides reliable electricity generation and can complement intermittent renewable sources. Critics counter that falling costs of solar, wind and battery storage are weakening the economic rationale for large-scale LNG expansion.

What is clear from the data is that Japan’s role in regional gas markets is evolving rapidly. The country is no longer simply a major LNG consumer; it has become a significant intermediary connecting US gas producers with Asian buyers.

As Asia balances energy security, affordability and climate goals, that role is likely to attract increasing scrutiny.

For policymakers, the question may no longer be whether LNG emits less carbon than coal at the point of combustion. Instead, it is whether a region racing to build a low-carbon future can afford to lock itself into another generation of fossil fuel infrastructure.

Continue Reading

Society

The Coal Paradox: More Coal Plants, Less Coal Power

A new Global Energy Monitor report shows global coal capacity rising in 2025 even as coal-fired electricity generation declines amid rapid renewable energy growth.

Rishika Nair

Published

on

coal j
Image credit: Dapur Melodi /Pexels

The world is building more coal plants, but using less coal than before. That contradiction lies at the centre of a new report by Global Energy Monitor (GEM), an international organisation that tracks energy infrastructure and the global shift toward cleaner power.

According to GEM, whose databases and research are widely used by institutions including the IPCC, IEA, UNEP and the World Bank, countries are continuing to expand coal power infrastructure even as coal’s role in electricity generation weakens globally.

The latest edition of GEM’s Boom and Bust 2026 report found that global coal power capacity grew by 3.5% in 2025, while coal-fired electricity generation declined by 0.6%. The report describes the trend as a major structural shift in the global energy system, where coal remains politically important in several countries even as renewable energy increasingly replaces it in practice.

China and India Drive Coal Growth

The contradiction is most visible in China and India, the world’s two largest coal consumers. Both countries commissioned large amounts of new coal capacity in 2025, even as coal generation declined because of record additions in solar and wind power.

China expanded coal capacity by 6% in 2025, while coal-fired generation fell by 1.2%. India recorded a similar pattern, with coal capacity increasing by 3.8% even as coal generation dropped by 2.9%.

The report suggests that coal’s decline is becoming increasingly durable despite global energy uncertainties, including geopolitical tensions affecting fuel supply routes such as the Strait of Hormuz. Renewable energy expansion has continued rapidly enough to reduce coal’s role in meeting new electricity demand.

Christine Shearer, Project Manager of GEM’s Global Coal Plant Tracker, described the trend as a defining paradox of the global energy transition.

“In 2025, the world built more coal and used it less,” she said. She added that 95% of all coal plant construction is now concentrated in China and India, even as both countries expand renewable energy fast enough to displace coal generation.

China’s Coal Pipeline Continues to Surge

China remained the dominant force in global coal expansion during 2025. The country recorded a record 161.7 GW of new and revived coal projects, while more than 500 GW of coal-fired capacity is currently under development.

The report warned that if these projects move ahead, China could remain locked into years of additional coal use throughout its 15th Five-Year Plan period from 2026 to 2030, despite official commitments to reduce coal consumption during the same timeframe.

India Expands Coal While Renewables Accelerate

India is also continuing major coal expansion plans. The country recorded 27.9 GW of new and revived coal proposals in 2025. Overall, India now has more than 107 GW of coal capacity in pre-construction planning and another 23.5 GW already under construction.

The Indian government has announced plans to add 100 GW of new coal capacity over the next seven years, even as renewable energy growth continues at record pace. In 2025, non-fossil fuel sources crossed the milestone of accounting for more than half of India’s installed electricity capacity.

Coal Development Shrinks Outside Asia

Outside China and India, coal development is shrinking rapidly. Only 32 countries were proposing or building new coal plants in 2025, down from 38 countries the previous year and less than half the 75 countries pursuing coal expansion in 2014.

Coal construction activity outside China and India accounted for just 5% of global coal construction capacity in 2025, marking a record low and highlighting how geographically concentrated coal development has become.

Several regions also made notable progress away from coal. Latin America achieved “No New Coal” status in 2025, while South Korea committed to a complete coal phaseout.

Türkiye, which is preparing to host COP31, now has only one active coal plant proposal remaining, compared with more than 70 proposed projects in 2015.

Delayed Coal Retirements Raise Concerns

The report also found that retirement plans for existing coal plants are slowing in several regions. Nearly 70% of coal-fired units scheduled for retirement globally in 2025 failed to retire as planned.

In the European Union, many delays were linked to energy security concerns that emerged during the 2022–23 energy crisis. In the United States, several ageing coal plants remained operational because of direct government interventions aimed at maintaining grid reliability.

Indonesia continued expanding its coal fleet, which grew by 7% in 2025, largely driven by captive coal plants supporting nickel and aluminium processing industries.

South Asia and Southeast Asia Show Mixed Trends

Elsewhere in South Asia, Pakistan rapidly expanded distributed solar energy, helping stabilise its electricity system against volatile fossil fuel markets. Bangladesh, meanwhile, continues to face fuel supply and technical challenges linked to its fossil-fuel-based power sector.

Across Southeast Asia outside Indonesia, coal commissioning declined for the third consecutive year. However, disruptions in regional gas supplies during 2026 led some countries to rely more heavily on existing coal infrastructure as a temporary backup source.

In Africa, new coal proposals remain limited and are mainly concentrated in Zimbabwe and Zambia.

Renewable Energy Reshapes the Global Energy Transition

The report concludes that coal is no longer expanding as a universally accepted solution for rising electricity demand. Instead, coal development is increasingly concentrated in a small number of countries, even as renewable energy demonstrates its ability to meet growing demand more efficiently and sustainably.

Continue Reading

Sustainable Energy

India’s Clean Energy Boom Collides With Coal Expansion

India crossed a renewable energy milestone in 2025, but coal power expansion continues as new projects and construction activity rise sharply.

Rishika Nair

Published

on

coal o
Image credit: Md. Noor Hossain/Pexels

India crossed a major renewable energy milestone in 2025, but the country’s continued expansion of coal power projects is raising new questions about the long-term direction of its energy strategy.

A new report by the international energy research organisation Global Energy Monitor (GEM) shows that India’s coal power capacity continued to grow in 2025 even as coal-fired electricity generation declined — a trend the report describes as part of a widening global disconnect between expanding coal infrastructure and falling coal usage.

According to Boom and Bust 2026, GEM’s annual assessment of the global coal industry, India’s coal power capacity increased by 3.8% in 2025, while electricity generation from coal plants fell by 2.9%.

The decline in coal generation came alongside record additions of solar and wind energy capacity. India’s non-fossil fuel power capacity reached nearly 267 GW during the year, allowing clean energy sources to account for more than 50% of the country’s total installed electricity capacity for the first time. Solar and wind energy increasingly met rising electricity demand, reducing coal’s role in supplying additional power needs.

Coal Capacity Continues to Expand

Despite the renewable surge, India continued commissioning new coal plants. Coal plant additions reached 10 GW in 2025, while retirements remained below 1 GW. The report noted that the slow pace of retirements aligns with recommendations from the Central Electricity Authority (CEA), which has argued that thermal power capacity should be retained through 2030 to maintain grid stability and energy security.

India’s total coal fleet has now expanded to more than 250 GW of installed capacity, including around 226 GW directly serving the power sector.

The report also highlighted a sharp rise in coal projects under development. India recorded 27.9 GW of new and revived coal power proposals in 2025, extending a fifth consecutive year of growth in planned coal capacity. Proposed coal capacity has increased from 29 GW in 2021 to 107 GW in 2025. Another 23.5 GW of coal capacity is currently under construction.

According to the report, the expansion closely mirrors the Indian government’s revised coal targets, which increased from 80 GW in 2024 to 100 GW in 2025. If all planned projects are completed, India’s coal fleet could expand by nearly 40% by 2032, even as renewable energy capacity continues to accelerate.

Heatwave Tests India’s Power System

Early 2026 data suggests coal’s contribution to electricity generation may be weakening further. Analysis of daily CEA generation figures cited in the report found that coal and lignite generation between January and April 2026 was around 2% lower than during the same period in 2025.

The decline came despite a record-breaking spring heatwave that pushed electricity demand to historic highs across India. During peak demand periods, solar energy reportedly supplied more than one-fifth of the country’s electricity demand, highlighting the growing role of renewables in grid reliability.

Christine Shearer, Project Manager of GEM’s Global Coal Plant Tracker, said the developments marked a turning point for India’s energy sector.

“India crossed a milestone in 2025, with renewables making up the majority of installed power capacity for the first time. We’re now seeing solar help meet record peaks in demand — a sign that clean energy is becoming central to India’s energy security, not just a supplement to it,” she said.

Shearer added that India’s future energy security would increasingly depend on improving coordination between existing power resources rather than adding more coal plants.
“As renewable generation continues to grow, that security will increasingly depend on how effectively existing resources operate together, rather than on the addition of new coal plants,” she said.

Global Coal Trends Show Growing Divide

The report places India within a broader global trend in which coal capacity continues to rise even as coal-fired electricity generation declines. Globally, coal power capacity grew by 3.5% in 2025, while coal generation fell by 0.6%.

China and India were identified as the clearest examples of this divergence. China’s coal power capacity expanded by 6% in 2025 even as coal generation declined by 1.2%. The country also recorded a record 161.7 GW of new and revived coal projects during the year.

The report noted that coal development is increasingly concentrated in fewer countries. The number of nations proposing or constructing new coal plants declined from 38 in 2024 to 32 in 2025. South Korea, Brazil and Honduras were among the countries exiting the coal pipeline, with South Korea pledging to phase out coal power by 2040.

Outside China and India, coal construction activity fell to just 5% of global construction capacity in 2025 — the lowest level recorded so far.

South Asia Shows Diverging Energy Paths

The report also highlighted differing energy trends across South Asia. Pakistan was cited for rapidly expanding distributed solar systems, while Bangladesh continued to face fuel supply and technical challenges linked to its fossil fuel-based power sector.

GEM’s Global Coal Plant Tracker, regarded as one of the world’s most comprehensive databases on coal-fired power infrastructure, tracks operating, proposed and retired coal power units above 30 MW worldwide.

Continue Reading

Trending