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Giulia Brachi and her team at the University of Colorado Boulder discovered that a mildly acidic environment (pH 4) can coax Pyrocystis lunula into a prolonged glow, allowing the algae to be embedded in a hydrogel and printed into luminous shapes.Acid‑Triggered Glow Enables 3D‑Printed Living LightBy adding a slightly acidic solution to a flask of the single‑celled algae, the researchers lowered the internal pH of the light‑producing organelles, activating the luciferase‑luciferin reaction. The algae were then suspended in a water‑rich hydrogel, which served as a printable medium. Using a standard 3D‑printer, the team produced blobby forms—including a crescent moon—that radiated a vivid cyan hue.Quantifying the Light: Duration, pH, and Print ResolutionGlow duration: up to 25 minutes per acid activation.Acidic trigger: solution adjusted to pH 4, comparable to a tomato.Print medium: hydrogel encapsulation preserving cell viability during extrusion.Potential Applications from Rave Bracelets to Eco‑SensorsWil Srubar envisions “living light” replacing disposable batteries in glow‑sticks, festival bracelets, and low‑power indicators. Embedding the algae in biosensors could provide visual alerts when toxins are detected, leveraging the natural luminescence as a read‑out. The approach also promises a reduction in electronic waste, as the bioluminescent reaction requires only seawater and a mild acid.Future Outlook: Scaling Living Light for Sustainable DevicesWhile the laboratory results are promising, Chris Howe of the University of Cambridge cautions that translating the system to real‑world conditions will require robust containment and longevity strategies. Ongoing research will focus on optimizing hydrogel formulations, extending the active lifespan of the algae, and integrating control mechanisms for on‑demand illumination. If successful, bioluminescent 3D‑printing could usher in a new class of biodegradable, low‑energy lighting solutions.

The Rise of Home Batteries in the UK As the UK prepares for a sharp rise in home energy bills, consumers are turning to green home upgrades, including heat pumps, solar panels, and electric vehicles. However, it's the falling cost of home batteries that's expected to unlock the greatest possible cost savings from these investments. How Home Batteries Work Home batteries allow households to store excess energy generated by solar panels or the grid during off-peak hours, reducing reliance on the grid during peak hours. This can lead to significant savings on energy bills. The Cost of Home Batteries The cost of a home battery depends on its capacity, with larger batteries typically costing more. On average, installing a 4kWh battery costs around £5,500. However, costs are falling, making home batteries more affordable. Potential Savings Households could save up to 87% on their electricity bills by using a home battery. A typical home in Milton Keynes with a 5kWh battery and a 4 kWh solar system could earn £300 a year by selling unused electricity back to the grid and save a further £458.45 a year by avoiding higher costs at peak times. The Future of Home Batteries As the cost of home batteries continues to fall, they are likely to become an increasingly popular choice for households looking to reduce their energy bills. With the UK government forecasting a rise in energy bills, home batteries are poised to play a key role in helping households manage their energy costs.

As the United Kingdom races toward a full digital landline switchover slated for January 2027, dozens of vulnerable households are sounding the alarm that the transition could leave them without any means of contacting emergency services during power outages.The Looming Digital Landline Cutover and Its Human TollTraditional copper lines, known as the public switched telephone network (PSTN), are being replaced by a “digital voice” service that runs over broadband routers. For most urban users the change is as simple as plugging a handset into a router, but for people in remote areas—such as Robert Dewar in the Scottish Highlands—power cuts can render both mobile and digital landline signals useless.Power outages lasting up to 42 hours have already left residents unable to call for help.Backup battery packs provided by providers typically last only one hour, far shorter than many recent outages.More than 100,000 signatures have been gathered on the “Save Our Landlines” petition demanding a deadline extension.Numbers Behind the Switch: Remaining PSTN Users and TimelineAccording to Ofcom’s 2025 Connected Nations report, about 3.2 million homes—roughly one‑fifth of the original PSTN base—still rely on copper lines. The regulator expects migration rates to accelerate this year, but the remaining customers are disproportionately those in rural or low‑income areas.1 % of BT’s landline premises are estimated to lack sufficient mobile signal for emergency calls.Backup battery solutions cost between £60‑£100 if not supplied free by the provider.Openreach has deployed over 4,000 engineers trained to support telecare users during the transition.Why Rural and Elderly Communities Face a CrisisAdvocacy group Silver Voices warns that the onus of arranging support falls on vulnerable customers, many of whom cannot self‑identify or afford additional equipment. Without reliable mobile coverage, a digital landline that loses power becomes a dead end for:Emergency medical alerts and telecare alarms.Daily contact for isolated seniors.Basic communication during prolonged blackouts.Case studies from Cornwall, Wales, and the Highlands illustrate a pattern of “incorrect information” from providers, unexpected cost increases, and delayed battery provision.What Regulators, Providers, and Advocates Must Do NextTo prevent a “disaster waiting to happen,” the following steps are essential:Extend the PSTN shutdown deadline to 2030 to allow time for affordable backup solutions.Mandate free, one‑hour backup batteries for all landline‑only customers, with longer‑lasting options subsidised for low‑income households.Require telecoms to deliver clear, multi‑channel notices at least 12 weeks before any switch‑off.Accelerate mobile‑signal upgrades in rural zones, leveraging government‑funded infrastructure grants.Empower consumer groups like Silver Voices to act as liaison bodies, ensuring vulnerable users are not left to “contact their provider” on their own.Only coordinated action between Ofcom, providers such as BT and Openreach, and consumer advocates will safeguard the most at‑risk citizens as the UK completes its digital landline transition.

The Lead The boss of the UK's biggest energy supplier has suggested that some households would accept an occasional electricity blackout in exchange for much lower energy bills. This controversial statement comes on the anniversary of Europe's largest power outage, which left tens of millions in Spain and Portugal without electricity. The Energy Trade-Off Proposal Greg Jackson, chief executive of Octopus Energy, told an industry conference that many households in Spain, which has a growing renewable energy business, would say they were happy to accept "the odd blackout" in return for electricity costs that are 25% lower. "To be really clear, I'm not advocating for blackouts, but if you asked Spanish consumers 'would you accept the odd blackout in return for electricity costs that are 25% lower, or don't have spikes, or a more reliable economy?' enough of them would say yes," he said. The Changing Perception of Power Outages People would be "far less bothered" about a blackout now than they might have been in the past, Jackson added, because they could continue watching things on their laptop during a power outage. "They've got a battery in there that gives them a couple of hours," Jackson said. He added that home batteries, which are sold by Octopus Energy, are "so cheap now" that even people who need reliable electricity to run medical equipment would be able to tolerate a blackout. The Cost of Grid Investments Jackson made the comments in response to an audience question about the challenges of running a renewables-heavy energy system such as the one in Spain. He told conference delegates that the greater challenge in running a clean power system was in controlling the cost of network investments. Octopus Energy has been outspoken in warning against grid investments that might prove to be unnecessarily expensive as new technologies emerge. The Spanish Precedent The widespread power outage in Spain and Portugal claimed the lives of at least six people, including two people with medical difficulties who died after they were unable to run breathing equipment. Renewable energy critics initially blamed Spain's reliance on wind and solar power for the outage, but the official report attributed "multiple interacting factors", involving conventional power plants, renewables and the power network for playing a role in Europe's largest power outage. The Industry Response A spokesperson for Octopus Energy said: "Countries that have embraced cheap renewables and built in flexibility – like Spain – are seeing dramatically lower energy prices and far less exposure to spikes. Meanwhile, the UK risks doing the opposite: hardwiring in high costs with tens of billions of grid and network spending, without enough transparency on whether all of it is really needed." "Build flexibility, and bills go down. Ignore it, and we risk overbuilding for decades," the spokesperson added. The UK's Energy Future Speaking at the same event, Fintan Slye, the chief executive of the National Energy System Operator, which is responsible for keeping Great Britain's lights on, said that while there is expected to be a "step change" in the way households use electricity that "doesn't go as far as blackouts". Slye said added that significant investments in the power grid were still needed to enable electricity to be transmitted from where it is generated to areas where people are located.

The Budget Decision That Favors Fossil Fuels Despite growing momentum for climate action, the upcoming Australian federal budget is poised to support fossil fuel industries by rejecting proposed reforms to gas taxation and fuel tax credits. This decision comes as 57 national governments meet in Colombia for the first international conference on transitioning away from fossil fuels, with France setting ambitious targets to remove coal by 2027 and end fossil fuel dependency by 2050. The Gas Tax Campaign and Its Unexpected Support A campaign for a 25% levy on gas exports has gained remarkable cross-political support, from the Greens and One Nation to independent MPs like David Pocock and potential Liberal leader Andrew Hastie. The movement also includes influencers, unions, heavyweight economists, former bureaucrats, ex-gas industry executives, and the broader environment movement. According to an Essential poll, 57% of voters support taxing gas export profits, with only 12% opposed. Economic Implications of the Rejected Reforms The rejected measures could have significantly impacted Australia's budget deficit and reduced implicit subsidies for multinational fossil fuel companies. The Australia Institute estimates a 25% gas tax would have yielded about $70 billion if introduced when Labor was elected in 2022. Former Treasury chief Ken Henry has even argued for a 100% windfall profits tax, suggesting substantial economic benefits that the government appears willing to forego. Political Calculations Behind the Decision Prime Minister Anthony Albanese has assured the gas industry that existing contracts won't change, linking his stance to the global fossil fuel crisis and emphasizing the importance of maintaining relationships with countries that buy Australia's fossil fuels. This political message, rather than technical considerations, appears to be driving the government's position, despite Treasury officials indicating that a 25% tax wouldn't affect existing contracts. The Fuel Tax Credit Controversy Parallel to the gas tax debate, the fuel tax credit scheme—which gives miners full rebates on the 52.6 cents per liter diesel excise—has faced increasing criticism. Mining magnate Andrew Forrest's company Fortescue launched an advertising campaign highlighting that 18 major mining companies receive $3 billion annually in diesel rebates while households struggle with rising living costs. The ACTU and Climate Change Authority chair Matt Kean have described continuing these rebates as "insane." Global Influences on Domestic Policy The government's decision to maintain the status quo on both issues has been influenced by global events, particularly the US-Israel war on Iran, which has pushed diesel prices skyward. This development has complicated efforts to reform the diesel rebate scheme, with the government prioritizing fuel security during a period of international instability. The Climate Action Gap While the government supports renewable energy and batteries, there is limited enthusiasm for addressing the need to reduce fossil fuel promotion and usage. This gap between climate commitments and actual policy underscores the challenges in transitioning away from fossil fuels, even as Australia's trading partners begin to seriously address the need to phase out coal, oil, and gas within the next couple of decades. Hope for Future Reform Despite the current setbacks, campaigners remain optimistic about the surge of cross-community support for a gas tax this year. The unprecedented pressure on an issue that previously had little traction suggests that change may be possible in the future, regardless of the immediate budget decisions. The movement plans to continue pushing for reform, viewing this moment as a critical step in a longer journey toward climate action.

The Growing Dependence on Chinese Green TechnologyEurope is "sleepwalking" into a series of economic and national security problems because of an over-reliance on Chinese green technology, according to experts. A report co-authored by Michael Collins, a former deputy head of national security strategy at the UK Cabinet Office, described the risks of depending on China for green tech as "serious"."Europe risks sleepwalking into a series of economic and geopolitical national security problems because of over-reliance on Chinese low-carbon technology," he said.China's Dominance in European Green Tech Supply ChainThe report said Europe was heavily dependent on Chinese green technology, with China supplying 98% of the continent's solar panels; 88% of imports of lithium-ion batteries, which are used in smartphones, electric vehicles and large-scale energy storage; and 61% of imports of inverters, which integrate renewable energy with a power grid. Chinese EV brands are also increasingly popular across Europe.Security Threats and Economic ImplicationsThe report said potential threats included China using "kill switches" to remotely disable solar panels, EVs or power grids. However, the report said such an attack was "very unlikely" unless China was at war or near conflict, given the risk of inciting retaliation."The national security risks of dependency on China for low-carbon technology are not the same as dependency on fossil fuel imports – but they are serious," it said, adding: "It is striking how poorly recognised the risks and their impact appear to be."The report claimed it was "very likely" that China used green tech to conduct surveillance, such as using offshore energy infrastructure to track submarine movements or use audio and video captured by EVs.Supply chain disruption, whereby China restricts supply of low-carbon tech and components, whether deliberately or due to unforeseen events such as extreme weather, was described as "likely" by the authors. The prospect of China dependence creating long-term economic harm was characterised as "very likely", with the report saying Europe's industrial competitiveness would be eroded – as shown by Chinese dominance of solar, EVs and batteries."Where the west once led, China now dominates," said the report.Broader Industry and Geopolitical ImplicationsThe report said a host of European industries could be affected by reliance on Chinese green technology, including car and wind tech manufacturing, with AI development also potentially affected. The defence sector also relies on many of the same components and manufacturing techniques as green tech, the report added, and as a result that industry could become more dependent on China as well.As China's importance to Europe's energy systems grow, it will be able to have a greater effect on the continent's ability to stand up to the country during disagreements."Europe does not want to be forced to choose between condemning and opposing Chinese activity in the South China Sea, or keeping their energy transition on track," said the report.It added that the relationship with the US could also make dependence on China problematic, because Washington could demand removal of Chinese suppliers or components.Future Outlook for European Green Tech IndependenceThe report was commissioned by Loom, a non-profit organisation that focuses on economic, environmental and national security issues, and was funded by the New Energy Industrial Strategy Center, a US-based non-profit. It was co-authored by Michal Meidan, the head of the China energy research at the Oxford Institute for Energy Studies.The report highlights the urgent need for Europe to diversify its green technology supply chain and develop domestic capabilities to reduce dependence on China, particularly in critical areas like solar panels, batteries, and inverters that are essential for the continent's energy transition.

The Dark Side of Critical Minerals Critical minerals such as lithium, cobalt, and nickel are becoming the 'oil of the 21st century' as the scramble for precious metals deepens poverty and creates public health crises in some of the world's most vulnerable communities. The Environmental and Health Impacts The investigation by the United Nations University Institute for Water, Environment and Health (UNU-INWEH) concluded that the growing demand for lithium, cobalt, and nickel used in batteries and microchips is draining water supplies, eroding agriculture, and exposing communities to toxic heavy metals. An estimated 456bn litres of water were used to extract 240,000 tonnes of lithium in 2024. About 700m tonnes of waste, enough to fill 59m bin lorries, were generated by global rare-earth production in 2024. The Human Cost The report found that while EVs may reduce emissions by consumers in North America and Europe, the environmental and health costs are borne by communities far away, in the mining regions of Africa and Latin America. In the Democratic Republic of the Congo, one of the world's biggest cobalt producers, extraction has caused the widespread contamination of rivers used for drinking, fishing, and irrigation. About 64% of people in the country lacked basic access to water in 2024. 72% of those near mining sites reported skin diseases. 56% of women and girls reported gynaecological problems. The Future Outlook The UN is warning that the transition to green energy cannot be at the expense of vulnerable communities and the environment. “Critical minerals are quickly becoming the oil of the 21st century,” said Kaveh Madani, director of UNU-INWEH. “What we are selling as a solution to sustainability is actively hurting people somewhere else in the world. How can we then call the transition green or clean?”

One‑Year Anniversary of the Iberian Blackout: What Happened?On 28 April 2025 Spain and much of Portugal experienced a continent‑shaking blackout that halted metros, fuel pumps and mobile networks. The event sparked a fierce debate about whether renewable energy or a lack of grid “inertia” was to blame.Grid Failure Rooted in Voltage Governance, Not Renewable InertiaThe final ENTSO‑E report identified a “perfect storm” of governance failures, especially around voltage control. Excessive or insufficient voltage caused generators to disconnect, triggering a cascading collapse. The investigation cleared solar and wind of any direct fault.Voltage mis‑management was the primary technical trigger.Regulatory limits had previously restricted wind and solar from providing voltage services.Post‑blackout reforms now allow renewables to participate in real‑time voltage control.Solar Capacity Jump: 13.8 GW Added in 2025According to Ember, Spain installed 13.8 GW of new solar capacity in 2025, up from 12.3 GW in 2024. July 2025 marked the country’s highest‑ever monthly capacity addition.Solar growth contributed to a 40 % reduction in wholesale electricity price exposure to gas in early 2024.Gas‑fired generation rose modestly in “reinforced mode” to aid voltage stability, but accounted for only half of the 2025 increase, the rest reflecting lower wind and hydro output.Average power price in March 2026: €43/MWh, the third‑lowest in Europe.Renewables Shield Spain from Gas Price Shock and Shape Future Energy PolicyAmid the 2026 Middle‑East conflict and soaring gas prices, Spain’s renewable base insulated consumers. Analysts note that without recent wind and solar growth, electricity prices would have been 40 % higher in the first half of 2024.Spain’s power price is roughly half of Germany’s (€99/MWh) and one‑third of Italy’s (€144/MWh).Regulatory change in April 2026 now permits >50 % of renewable plants to provide voltage compensation services.Experts stress that disinformation about renewable insecurity has collapsed, reinforcing policy support.What’s Next for Spain’s Power System? Toward Real‑Time Voltage Control and StorageFuture priorities include scaling large‑scale lithium‑ion battery storage and expanding renewable‑based voltage services. Chris Rosslowe of Ember predicts continued acceleration of non‑fossil generation, while José Luis Rodríguez warns that protecting the grid from gas price volatility will remain a driver for further renewable investment.Deploy grid‑scale batteries to replace the “heartbeat” previously provided by coal and gas turbines.Complete integration of renewable plants into voltage control markets by 2027.Monitor gas‑price trends to ensure renewables remain the cost‑effective backbone of Spain’s electricity system.

Renewables Overtake Fossil Fuels for the First Time in March 2026 The United States generated more electricity from solar and wind than from gas in March 2026, according to the Ember think‑tank. This milestone represents the first full month that clean energy has surpassed the planet‑heating fossil fuel nationally. Federal Courts Thwart Trump’s Anti‑Renewables Orders A federal court in Massachusetts blocked a series of Trump administration actions that sought to bar solar and wind projects on federal land. The ruling follows the resumption of five major offshore wind farms that the administration had previously ordered to halt. Legal challenges have halted attempts to restrict new renewable projects. Offshore wind projects are back on track, despite prior presidential opposition. Data Shows 93% of New U.S. Capacity in 2026 Will Be Green According to the Energy Information Administration, 93% of all electricity‑generation capacity added in 2026 is slated to come from solar, wind, or batteries, leaving only 7% for fossil‑fuel plants. Record renewable additions in 2025 set the stage for the 2026 surge. Electric‑vehicle sales and declining costs of wind, solar, and storage are driving the “tipping point”. Political and Market Implications of the Renewables Surge Experts say the market momentum is too strong for policy to reverse. Peter Davidson, CEO of Aligned Climate Capital, notes that renewables are now cheaper and faster to build than gas or coal plants. Public opinion is also shifting: a February poll found that over two‑thirds of Republican voters support solar power, while only 40% approve of Trump’s handling of rising energy costs. Future Outlook: Renewable Growth Likely to Outpace Policy Headwinds Analysts anticipate that the combination of court setbacks, falling renewable‑technology costs, and geopolitical factors—such as the Iran‑related oil price volatility—will keep accelerating the clean‑energy transition. Fatih Birol, head of the International Energy Agency, predicts a “significant boost to renewables and nuclear power” as countries seek to reduce dependence on volatile fossil‑fuel markets. While regulatory uncertainty remains, the business case for clean energy is now “super strong,” according to industry leaders, suggesting that investment and deployment will continue to rise despite political opposition.