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Solar Panel Costs Plummet 99% Since 1970s as Cross-Industry Innovations Drive RE Revolution

New MIT research reveals how 81 key technological advances from diverse sectors enabled dramatic cost reductions in photovoltaic systems

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Image credit: Sebastian Ganso from Pixabay

The cost of solar panels has dropped by more than 99 percent since the 1970s, enabling widespread adoption of photovoltaic systems that convert sunlight into electricity, according to an interesting new research from the Massachusetts Institute of Technology (MIT).

A comprehensive MIT study has identified the specific innovations behind this dramatic transformation, revealing that technical advances across a web of diverse research efforts and industries played a pivotal role in making solar energy economically viable worldwide.

Cross-industry innovation network

The research, published in PLOS ONE, demonstrates that key innovations often originated outside the solar sector entirely, including advances in semiconductor fabrication, metallurgy, glass manufacturing, oil and gas drilling, construction processes, and even legal domains.

“Our results show just how intricate the process of cost improvement is, and how much scientific and engineering advances, often at a very basic level, are at the heart of these cost reductions,” study senior author Jessika Trancik said in a media statement. “A lot of knowledge was drawn from different domains and industries, and this network of knowledge is what makes these technologies improve.”

Trancik, a professor in MIT’s Institute for Data, Systems, and Society, led the research team that identified 81 unique innovations affecting photovoltaic system costs since 1970, ranging from improvements in antireflective coated glass to the implementation of fully online permitting interfaces.

Strategic Implications for Industry

The findings could prove instrumental for renewable energy companies making R&D investment decisions and help policymakers identify priority areas to accelerate manufacturing and deployment growth.

The research team included co-lead authors Goksin Kavlak, now a senior energy associate at the Brattle Group, and Magdalena Klemun, currently an assistant professor at Johns Hopkins University, along with former MIT postdoc Ajinkya Kamat and researchers Brittany Smith and Robert Margolis from the National Renewable Energy Laboratory.

Key findings

Building on mathematical models previously developed to analyze engineering technologies’ effects on photovoltaic costs, researchers combined quantitative cost modelling with detailed qualitative analysis of innovations affecting materials, manufacturing, and deployment processes.

“Our quantitative cost model guided the qualitative analysis, allowing us to look closely at innovations in areas that are hard to measure due to a lack of quantitative data,” Kavlak said in a media statement.

The team conducted structured literature scans for innovations likely to affect key cost drivers such as solar cells per module, wiring efficiency, and silicon wafer area. They then grouped innovations to identify patterns and tracked industry origins and timing for each advance.

Module vs. Balance-of-system innovations

The researchers distinguished between photovoltaic module costs and balance-of-system (BOS) costs, which cover mounting systems, inverters, and wiring. While PV modules are mass-produced and exportable, many BOS components are designed and built locally.

“By examining innovations both at the BOS level and within the modules, we identify the different types of innovations that have emerged in these two parts of PV technology,” Kavlak added.

The analysis revealed that BOS costs depend more heavily on “soft technologies”—nonphysical elements such as permitting procedures—which have contributed significantly less to cost improvements compared to hardware innovations.

“Often, it comes down to delays. Time is money, and if you have delays on construction sites and unpredictable processes, that affects these balance-of-system costs,” Trancik said.

Industry cross-pollination

The research found that innovations from semiconductor, electronics, metallurgy, and petroleum industries played major roles in reducing both PV and BOS costs. BOS costs were additionally impacted by advances in software engineering and electric utilities.

Notably, while most PV panel innovations originated in research organizations or industry, many BOS innovations were developed by city governments, U.S. states, or professional associations.

“I knew there was a lot going on with this technology, but the diversity of all these fields and how closely linked they are, and the fact that we can clearly see that network through this analysis, was interesting,” Trancik said in a media statement.

“PV was very well-positioned to absorb innovations from other industries—thanks to the right timing, physical compatibility, and supportive policies to adapt innovations for PV applications,” Klemun added.

Quantifying impact

To demonstrate their methodology’s practical applications, researchers estimated specific innovations’ quantitative impact. For example, wire sawing technology introduced in the 1980s led to an overall PV system cost decrease of $5 per watt by reducing silicon losses and increasing manufacturing throughput.

Future applications and computing power

The analysis highlighted the potential role of enhanced computing power in reducing BOS costs through automated engineering review systems and remote site assessment software.

“In terms of knowledge spillovers, what we’ve seen so far in PV may really just be the beginning,” Klemun said, pointing to robotics and AI-driven digital tools’ expanding role in driving future cost reductions and quality improvements.

The research team plans to apply this methodology to other renewable energy systems and further study soft technology to identify processes that could accelerate cost reductions.

“Through this retrospective analysis, you learn something valuable for future strategy because you can see what worked and what didn’t work, and the models can also be applied prospectively. It is also useful to know what adjacent sectors may help support improvement in a particular technology,” Trancik said. “Although the process of technological innovation may seem like a black box, we’ve shown that you can study it just like any other phenomena.”

The research provides crucial insights for understanding how complex technological systems evolve and offers a roadmap for accelerating innovation in renewable energy and other critical technologies through strategic cross-industry collaboration.

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Climate

Could Global Warming Make Greenland, Norway and Sweden Much Colder?

A Nordic Council report warns that global warming could make Norway colder if the Atlantic ocean circulation collapses, triggering severe climate impacts.

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Could Global Warming Make Greenland, Norway and Sweden Much Colder? Nordic Report Says Yes
A new Nordic report warns global warming could drive parts of northern Europe into far colder conditions if a major Atlantic ocean current collapses. Hamnøy, Norway. Image credit: Petr Slováček/Pexels.

Global warming is usually associated with rising temperatures—but a new Nordic report warns it could drive parts of northern Europe into far colder conditions if a major Atlantic ocean current collapses.

Greenland, Norway and Sweden could experience significantly colder climates as the planet warms, according to a new report by the Nordic Council of Ministers that examines the risks linked to a possible collapse of the Atlantic Meridional Overturning Circulation (AMOC).

The report, A Nordic Perspective on AMOC Tipping, brings together the latest scientific evidence on how global warming is slowing the AMOC—one of the world’s largest ocean circulation systems, responsible for transporting heat from the tropics to the North Atlantic. While a full collapse is considered unlikely, the authors warn that it remains possible even at relatively low levels of global warming, with potentially disruptive consequences for northern countries.

The Reversal

If the circulation were to weaken rapidly or cross a tipping point, the report notes, northern Europe could cool sharply even as the rest of the world continues to warm. Such a reversal would have wide-ranging effects on food production, energy systems, infrastructure, and livelihoods across the Nordic region.

“The AMOC is a key part of the climate system for the Nordic region. While the future of the AMOC is uncertain, the potential for a rapid weakening or collapse is a risk we need to take seriously,” said Aleksi Nummelin, Research Professor at the Finnish Meteorological Institute, in a media statement. “This report brings together current scientific knowledge and highlights practical actions for mitigation, monitoring and preparedness.”

A climate paradox

The AMOC plays a central role in maintaining the relatively mild climate of Northern Europe. As global temperatures rise, melting ice from Greenland and increased freshwater input into the North Atlantic are expected to weaken this circulation. According to the report, such changes could reduce heat transport northwards, leading to colder regional conditions—particularly during winter—even under a globally warming climate.

Scientists caution that the impacts would not simply mirror gradual climate change trends. Instead, an AMOC collapse could trigger abrupt and uneven shifts, including expanded sea ice, stronger storms, altered rainfall patterns, and rising sea levels along European coastlines. Some of these impacts would occur regardless of when or how quickly the circulation weakens.

The report also highlights global ripple effects. A slowdown of the AMOC could shift the tropical rain belt southwards, with potentially severe consequences for monsoon-dependent regions such as parts of Africa and South Asia, underscoring that AMOC tipping is not a regional concern alone.

Calls for precaution and preparedness

Given the uncertainty surrounding when—or if—the AMOC might cross a critical threshold, the report urges policymakers to adopt a precautionary approach. It stresses that any additional global warming, and prolonged overshoot of the 1.5°C target, increases the risk of triggering a collapse.

Key recommendations include accelerating emissions reductions, securing long-term funding for ocean observation networks, and developing an early warning system that integrates real-world measurements with climate model simulations. The authors argue that such systems should be embedded directly into policymaking to enable rapid responses.

The report also calls for climate adaptation strategies that account for multiple futures—including scenarios in which parts of Northern Europe cool rather than warm. It emphasises that AMOC collapse should be treated as a real and significant risk, requiring comprehensive risk management frameworks across climate, ocean, and disaster governance.

Science driving policy attention

The findings were developed through the Nordic Tipping Week workshop held in October 2025 in Helsinki and Rovaniemi, bringing together physical oceanographers, climate scientists, and social scientists from across Nordic and international institutions. The initiative was partly motivated by an open letter submitted in 2024 by 44 climate scientists, warning Nordic policymakers that the risks associated with AMOC tipping may have been underestimated.

By consolidating current scientific understanding and translating it into policy-relevant recommendations, the report aims to shift AMOC collapse from a theoretical concern to a concrete risk requiring immediate attention.

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Science Is Talking – Why Aren’t We Hearing?

Why the world still struggles to communicate science, and how researchers, journalists, and
institutions can rebuild a broken chain

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Have you ever listened to an expert discuss their work and felt like they were speaking a completely different language? You’re not alone. Scientific breakthroughs have the power to shape our health, environment, and future, yet they often remain locked behind a wall of jargon and complexity, failing to reach the public or the policymakers who write our laws.

This communication breakdown creates a “broken chain of knowledge,” with crucial information stuck at its source. The path from a scientific discovery to public understanding and sound policy is fraught with obstacles, from the culture inside the lab to systemic barriers in government.

Let us look at the most significant reasons for this disconnect. By understanding the challenges from the perspectives of scientists, journalists, and policymakers, we can begin to see how we might mend the chain and ensure that knowledge flows to where it’s needed most.

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The First Barrier Isn’t a Wall, It’s a Mindset

The communication problem often begins not with external hurdles, but within the culture of science itself. Before a single word is spoken to the public, an internal mindset can prevent scientists from effectively sharing their work. Some researchers operate with what former Indian minister Jairam Ramesh calls a “high pad” mentality, believing their specialized knowledge places them above the need for public engagement.

As Ramesh recently points out at the Science Journalists Conference of India, Ahmedabad University, this attitude is a primary barrier: “Too often I find scientists sitting on a high pad thinking that they have a better knowledge than the rest of the people… they speak in jargon they speak in their own language and they are really appealing to the community and not necessarily to the non-scientific community.”

Dr. Abhijit Majumdar of IIT Bombay acknowledges that scientists are often poor communicators — but he stresses a deeper issue: “Before learning how to communicate, scientists must first appreciate the need to communicate with the general public.” That awareness, he says, is still lacking in many settings. Experts note that this gap persists for two key reasons. The first is mindset: a cultural tendency to work in isolation — an “ivory tower inside their own ego.” The second is Language: after years of specialization, many scientists use technical vocabulary without realizing it’s incomprehensible jargon to outsiders, effectively building a wall where they intend to build a bridge. Overcoming this internal culture is the first step toward unlocking the mutual benefits of communication.

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It’s Not ‘Dumbing Down,’ It’s a Two-Way Street

A fundamental misunderstanding of science communication is that it’s simply “dumbing down” complex work; in reality, it is a transformative, two-way exchange that can lead to deeper insights for the researchers themselves.

When scientists are challenged to explain their work to non-experts, they must distill complex ideas to their “’observable conceptual’ level.” This act of translation often forces them to see their own work from a new perspective, uncovering fresh insights. As Dr. Majumdar states, the benefits flow in both directions:

“It’s a two-way street, it is beneficial for the sides if we learn how to communicate.”

Furthermore, this process can generate questions from the public that are “much more superior” to those scientists typically receive from their peers, pushing their research in new and unexpected directions.

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A Scientist’s Silence Creates a Vacuum for Misinformation

In our modern digital world, many scientists are hesitant to speak publicly, “scared that one wrong use of the work can be taken out of the context,” potentially leading to professional backlash. While this caution is understandable, it creates a dangerous paradox.

When credible experts stay silent on a complex issue, they create an “information vacuum.” That empty space will not remain empty for long. It is inevitably filled by less informed, less qualified, or even malicious actors eager to become the spokesperson on the topic. The silence of experts, therefore, directly enables the spread of false narratives.

In an era with a “lot of misinformation,” the proactive solution is a strong partnership between cautious, responsible scientists and trusted journalists. This collaboration is the public’s best and most powerful defense against falsehoods.

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The System Itself Is Designed to Fail

Even when individual scientists are willing to engage, they are often crushed by systemic and structural barriers. The larger systems governing science and media are frequently not built to support public communication, a problem that is truly global in scope.

Studies reveal a stark reality. Nearly 46% of academics in one study had never communicated their findings beyond peer circles, with 80% citing a lack of time as a major barrier. A global survey of geoscientists found that while 90% believe they have a moral duty to engage, 87% identified a lack of funding as a key obstacle. This isn’t confined to one region; a study in Zimbabwe found nearly half of academics had never shared their research with public audiences.

In India, this is compounded by institutional support that suffers from “irregular funding” and offers little incentive for sustained engagement. Interestingly, a 2020 Pew Research survey found that 75% of Indians believe government investment in science is worthwhile, suggesting a public appetite for knowledge that the system is failing to meet.

Further straining the system is the inherent conflict between the clashing timelines of science and journalism. Science is slow, careful, and methodical, prioritizing peer review and accuracy. The news cycle is instantaneous and reactive, demanding immediate responses for a public hungry for information. This friction between a scientist’s verification process and a journalist’s deadline puts constant stress on the very relationship needed to bridge the knowledge gap.

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In Policy, There’s a Structural Wall Between Science and Law

Even when science successfully reaches the public, the final link in the chain—influencing policy—is often completely broken. In India, for instance, Jairam Ramesh describes a profound structural disconnect between the nation’s scientific community and its lawmakers.

He explains that Members of Parliament receive their information almost exclusively from “government bodies” and “ministries,” not from the independent scientific institutions that house the country’s experts. This has led to a glaring absence of science-informed debate on some of the most critical issues facing the nation, including:

  • GM crops
  • Nuclear policy
  • The increasing frequency of landslides and earthquakes

Global warming and its impact on agriculture, health, and energy

To fix this, Ramesh proposes that India’s scientific academies must take a more “active role.” Instead of relying on individuals, these institutions should consolidate a “collective view” from the scientific community and present it directly to legislators, providing an authoritative voice that is much harder for policymakers to ignore.

Building the Bridge, Together

Mending the broken “chain of knowledge” is not a simple task, nor is it the responsibility of a single group. It requires a collaborative effort from scientists who see communication as a duty, journalists who build trust and provide context, and institutions that create systems that reward and support public engagement.

Breaking down these barriers is a critical responsibility for any society that wishes to be guided by evidence and shared understanding. By strengthening every link in the chain—from the lab to our laws—we can build the bridge to a future shaped by insight and reason. If knowledge is power, how can we each help ensure it flows to where it’s needed most?

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Climate

A Green Turn with Gaps: India’s Budget Backs Clean Tech but Skips Climate Adaptation

India’s Budget 2026–27 doesn’t shout climate ambition—but it hardwires it into clean manufacturing, carbon capture and energy supply chains, quietly reshaping the country’s green economy from the inside out.

Dipin Damodharan

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Clean Energy, Carbon Capture—and a Quiet Omission: Reading Budget 2026–27 Through a Climate Lens
India’s Union Minister for Finance and Corporate Affairs, Nirmala Sitharaman along with the Minister of State for Finance, Pankaj Chaudhary as well as her Budget Team of the Ministry of Finance before presentation of the Union Budget-2026 at Parliament House, in New Delhi. Image credit: PIB

India’s Union Budget 2026–27 may not carry a standalone climate chapter, but its green intent runs deep through the fine print. From carbon capture and battery storage to critical minerals and clean manufacturing, the budget signals a strategic shift: climate action is no longer framed as an environmental add-on, but as industrial policy and economic risk management rolled into one.

Presented by Finance Minister Nirmala Sitharaman on February 1, 2026, the budget places clean energy and climate-aligned manufacturing at the heart of India’s growth narrative. With a GDP growth target of around 7 percent and a sharp focus on fiscal discipline, sustainability is being embedded into supply chains, cities, transport and finance—quietly but deliberately.

Carbon Capture Takes Centre Stage

The most striking climate-linked announcement is the Rs 20,000 crore allocation over five years for Carbon Capture, Utilisation and Storage (CCUS), aimed at hard-to-abate sectors such as power, steel, cement, refineries and chemicals. For the first time, industrial decarbonisation is being backed at scale through public finance, signalling recognition that renewables alone cannot carry India’s net-zero journey.

As Arunabha Ghosh of CEEW notes, the budget’s “prioritisation of carbon capture, utilisation and storage across power, steel, cement, refineries, and chemicals” places these sectors squarely at the centre of India’s long-term climate pathway. This marks a decisive move from aspiration to infrastructure.

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Building the Clean Energy Ecosystem

The energy transition is supported by coordinated allocations across key ministries: Rs 32,915 crore for New and Renewable Energy, Rs 29,997 crore for Power, and Rs 24,124 crore for Atomic Energy. Customs duty exemptions have been extended to lithium-ion cells used in battery energy storage systems, inputs for solar glass manufacturing, and nuclear power project imports till 2035.

Aarti Khosla of Climate Trends captures this shift succinctly: “Coupled with the exemption given to battery manufacturing, VGF for BESS and grant to CCUS, the focus of the government is rightly tilting towards building an energy transition ecosystem.” She adds that continued reforms in power distribution could bring “360-degree improvement in India’s green energy supply chain.”

At the household level, the PM Surya Ghar Muft Bijli Yojana receives a major boost, reinforcing decentralised clean energy as a pillar of inclusive growth. Rooftop solar is increasingly being positioned not just as a climate solution, but as a competitiveness tool for small businesses and urban households.

Supply Chains, Not Just Solar Panels

Rather than headline-grabbing renewable capacity targets, Budget 2026–27 leans into industrial resilience. Duty exemptions for critical minerals processing equipment, solar glass inputs, and battery storage components underline a focus on domestic value addition.

Energy analyst Duttatreya Das of Ember observes that while there are “no big-ticket announcements for renewables,” the continued duty exemptions and manufacturing reforms are expected to “quietly strengthen clean energy supply chains.” This reflects a broader policy philosophy: competitiveness before capacity, foundations before scale.

Rare Earth Corridors and incentives for mineral-rich coastal states further indicate a push to secure upstream inputs essential for EVs, batteries, wind turbines and electronics—areas where geopolitical vulnerabilities are growing.

Clean Mobility and Greener Cities

Sustainability also shapes transport and urban planning. The budget proposes 20 new national waterways over five years, aims to double the share of inland and coastal shipping by 2047, and identifies seven high-speed rail corridors as environmentally sustainable growth connectors. Municipal finance incentives—such as Rs 100 crore support for cities issuing large bonds—open space for green urban infrastructure, including pollution control and climate-resilient services.

Labanya Prakash Jena,Director, Climate and Sustainability Initiative, highlights that such incentives can catalyse “green municipal bonds, particularly for pollution control and urban environmental projects,” linking fiscal reform directly with urban sustainability.

The Gaps That Remain

Despite these advances, the budget remains notably silent on climate adaptation. Heat stress, floods, water scarcity and climate-resilient agriculture receive no scaled-up fiscal roadmap. Vibhuti of IEEFA points out that while support for decentralised renewables and bioenergy has increased, spending on transmission and energy storage has stagnated or declined—areas that are “not optional but indispensable” for a high-renewables grid.

The absence of strong EV demand-pull measures and limited risk-sharing instruments for private capital also signal unfinished business in India’s clean transition.

A Budget of Signals, Not Slogans

Budget 2026–27 is not a climate manifesto. Instead, it is a signal budget—one that rewires incentives, de-risks clean manufacturing, and treats decarbonisation as an economic strategy rather than a moral appeal. Its strength lies in industrial tools and fiscal realism; its weakness, in adaptation and social resilience.

Whether this quiet green turn translates into measurable emissions reductions and climate resilience will depend on execution, state capacity, and private investment. But one thing is clear: India’s clean-tech transition has now entered the core of its economic planning.

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