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MIT Study Reveals Hidden Innovations Behind Solar Power’s Dramatic Cost Decline

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Solar energy, once a costly and niche technology, has become one of the most affordable and widely used power sources in the world. A new study from the Massachusetts Institute of Technology (MIT), published in PLOS ONE, has traced the dramatic fall in solar costs — more than 99 percent since the 1970s — to a complex web of innovations that span far beyond solar technology itself.

Researchers identified 81 distinct breakthroughs that have steadily lowered the cost of photovoltaic (PV) systems over the past five decades. These include technical improvements within the panels, such as wire-sawing methods that reduce silicon waste, alongside systemic changes like faster permitting procedures for new projects. Strikingly, many of these advances emerged from industries unrelated to solar power, including semiconductors, glassmaking, and even legal reforms.

“The story of how solar became the cheapest form of electricity in history is one of steady, systemic innovations,” said Kostantsa Rangelova, global electricity analyst at energy think tank Ember. She explained that incremental advances became transformative when combined with economies of scale and mass production, magnifying small efficiencies into significant cost reductions.

The effects of these changes are already reshaping energy markets. In June, solar power generated more electricity than any other source in the European Union for the first time — a symbolic milestone amid surging clean energy investments. Globally, around €1.7 trillion was invested in renewables last year, outpacing fossil fuels by €685 billion. Offshore wind has also become more cost-effective, but the price drop in solar remains the most dramatic, positioning it as a leader in the global shift to renewables.

Looking ahead, MIT researchers argue that the next phase of cost reductions may come from unexpected areas, including software, robotics, and grid integration. Tools such as automated engineering reviews, AI-driven design, and modular panel construction could deliver new savings and improve quality. “What we’ve seen so far in PV may really just be the beginning,” said study co-author Magdalena Klemun, noting that spillovers from other sectors will continue to accelerate change.

However, challenges remain, particularly in end-of-life management. Solar panels, designed to last over 30 years, are difficult to dismantle and recycle, raising concerns about mounting waste as older units retire. Researchers and companies across Europe, Australia, and beyond are now exploring sustainable recycling methods, repair programs, and reusable designs to address this issue. Similar concerns are emerging in the wind industry, where turbine waste could reach 43 million tonnes by 2050.

The MIT team emphasized that many of the systemic innovations driving solar’s success originated not only from laboratories and corporations but also from government-led initiatives. By learning from solar’s history, policymakers and industry leaders can better support breakthroughs in other renewable technologies.

“Through this retrospective analysis, you learn something valuable for future strategy,” said Jessika Trancik, lead author of the study. “It is also useful to know what adjacent sectors may help support improvement in a particular technology.”

With solar now at the forefront of clean energy, its past offers critical lessons for accelerating the world’s transition toward a net-zero future.

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Chile Holds Presidential Election Amid Crime and Immigration Debate

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Chile is holding its presidential election on Sunday, with candidates campaigning on tough stances on crime and immigration. The vote comes four years after progressive Gabriel Boric was elected, at a time when the electorate is deeply divided and a new compulsory voting law adds an element of uncertainty.

Over 14 million Chileans are eligible to vote in the elections, which will also renew the entire Chamber of Deputies and nearly half of the Senate. Security and immigration concerns have dominated the campaign, shifting public attention toward conservative candidates. Evelyn Matthei has called for drug traffickers to be “in jail or in the cemetery,” while Franco Parisi described drug trafficking as “narco-terrorism” and advocated for “bullet or jail.”

The three main contenders offer contrasting visions for Chile’s future. José Antonio Kast, 59, a Republican Party member and the brother of a former minister who served under General Augusto Pinochet, is running for president for the third time. He has focused his campaign on combating crime and illegal immigration. Jeannette Jara, 51, a former minister in Boric’s government and member of the Communist Party, has pledged to expand pensions, lower electricity costs, and construct tens of thousands of new homes. Johannes Kaiser, 49, a former YouTube commentator and legislator, has questioned vaccination programs, opposed abortion, and promised to withdraw Chile from climate agreements and the Inter-American Court of Human Rights.

The introduction of compulsory voting in 2023 could significantly affect turnout, particularly among younger voters. Generation Z, born after 1996, accounts for roughly a third of the electorate, and polls suggest that 30% of these voters have yet to decide. Social media has played a major role, with candidates using platforms like TikTok to mobilize supporters. Jara and Matthei have accused Kast of orchestrating social media campaigns against them, allegations he denies.

Polls indicate a close race. Latest surveys show Jara leading with 30% support, followed by Kast at 22% and Kaiser at 15%. Prediction markets, however, see Kast as the frontrunner with a 70% chance of winning. Analysts suggest that none of the candidates is likely to secure an absolute majority on Sunday, making a run-off election probable on 14 December, likely between Jara and Kast.

A conservative or far-right advance could also reshape the legislative landscape. Polls suggest that both coalitions might achieve a majority in Congress, raising the possibility of a government with limited parliamentary opposition—a scenario not seen in Chile in the past 15 years.

Polling stations opened at 8:00 local time (UTC-4) and will close at 18:00. With crime, immigration, and economic issues at the forefront, this election is being closely watched as a test of Chile’s political direction in a highly polarized environment.

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Trump Orders Justice Department Probe Into Epstein Ties With Clinton, Other Democrats

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Former US President Donald Trump has directed Attorney General Pam Bondi to launch an investigation into connections between convicted sex offender Jeffrey Epstein and several prominent Democrats, including former President Bill Clinton. The move follows the release of new emails by Congress showing Epstein’s communications with influential figures in the US and abroad.

The emails, released Wednesday by the House Oversight Committee, stem from Epstein’s personal accounts and reveal interactions with lawmakers, business leaders, and other high-profile individuals. Trump accused the Democratic Party of attempting to revive what he called the “Epstein hoax” to distract from policy failures and political setbacks, including a recent government shutdown.

“Epstein was a Democrat, and he is the Democrat’s problem, not the Republican’s problem,” Trump said in a statement on social media. He also referenced Clinton, former Treasury Secretary Larry Summers, and LinkedIn founder and major Democratic donor Reid Hoffman, asserting that they had close ties to Epstein.

Trump confirmed that he had instructed Bondi to investigate Epstein’s connections with Clinton, Summers, Hoffman, and financial institutions such as J.P. Morgan Chase. “I will be asking A.G. Pam Bondi, and the Department of Justice, together with our great patriots at the FBI, to investigate Jeffrey Epstein’s involvement and relationship with Bill Clinton, Larry Summers, Reid Hoffman, J.P. Morgan, Chase, and many other people and institutions, to determine what was going on with them, and him,” Trump said.

Clinton has denied any wrongdoing or awareness of Epstein’s criminal activities. J.P. Morgan Chase also issued a statement expressing regret over any association with Epstein, emphasizing that it had ended relations with him years before his arrest. “We regret any association we had with the man, but did not help him commit his heinous acts,” said Patricia Wexler, a spokesperson for the bank.

Bondi announced via social media that she had appointed Jay Clayton, U.S. Attorney for the Southern District of New York, to oversee the investigation. “Clayton is one of the most capable and trusted prosecutors in the country, and I’ve asked him to take the lead,” she said, noting that the Department of Justice would conduct the inquiry with “urgency and integrity.”

The announcement comes a week before the House of Representatives is set to vote on whether the Justice Department should release all files related to Epstein, who died by suicide in a federal prison in 2019 while awaiting trial on sex-trafficking charges. Republican Congresswoman Marjorie Taylor Greene urged Trump to ensure that House Republicans vote in favor of releasing the documents, calling failure to do so a “huge miscalculation.” Greene and four other House Republicans have already filed a discharge petition, which has garnered 218 signatures, seeking the public release of all Epstein-related records.

The investigation highlights ongoing scrutiny of Epstein’s network and connections to prominent political and financial figures, as well as continuing debates over transparency and accountability in Washington.

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US Nuclear Weapons in Germany Raise Security Questions Amid Rising Global Tensions

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As the Bundeswehr marks its 70th anniversary in Berlin, the celebration is shadowed by growing anxiety over Germany’s security. Around 20 US nuclear weapons are currently stored in the country—modernised, ready for use, and symbolic of Washington’s longstanding commitment to Europe’s defence. Yet experts warn that this deterrent may not guarantee protection if the United States hesitates to act in a crisis.

The weapons, believed to be B61-12 hydrogen bombs stored at Büchel Air Base in Rhineland-Palatinate, can be deployed by fighter jets such as the Eurofighter. Their destructive capacity remains immense. The bombs form part of the US nuclear umbrella extended to NATO allies since the Cold War, but concerns have deepened over the reliability of that shield under President Donald Trump, who has questioned aspects of NATO’s mutual defence commitments.

“It has never been and cannot be certain that the US will actually deploy nuclear weapons. It is not a guarantee. But the important thing is that the enemy cannot rule it out,” said political scientist and security expert Karl-Heinz Kamp, a former president of the Federal Academy for Security Policy and an associate fellow at the German Council on Foreign Relations. “Deterrence is pure speculation. It has held up so far, for 50 years.”

Reports from several US media outlets suggest that the United States brought new nuclear weapons to Europe over the summer, with signs including flight paths and the delivery of F-35 fighter jets designed to carry tactical nuclear weapons. Germany has also ordered a fleet of F-35s, expected to arrive in 2026.

Since the invasion of Ukraine in 2022, nuclear deterrence has returned to the forefront of European security debates. Russian President Vladimir Putin has repeatedly brandished nuclear threats, touting his arsenal of about 5,500 warheads and showcasing intercontinental missiles such as the RS-24 “Yars.” Kamp noted that while Putin uses nuclear rhetoric as a political tool, actual deployment remains unlikely. “Whoever shoots first, dies second. That is not a desirable state of affairs,” he said.

Still, questions persist about whether US nuclear weapons in Germany could be relocated to NATO’s eastern flank, including the Baltic states, Poland, or Romania, as a stronger warning to Moscow. Kamp acknowledged this possibility, calling such a move a potential “signal to Russia.”

Anti-nuclear groups, including ICAN Germany, continue to demand the withdrawal of US weapons from German territory, arguing that they make the country a target rather than a protectorate.

While some analysts argue that Germany could technically produce its own nuclear arsenal, Kamp described the idea as politically untenable given Germany’s post-war commitments. The nation is bound by the 1990 Two Plus Four Treaty and the 1969 Nuclear Non-Proliferation Treaty, both of which prohibit it from developing nuclear weapons.

Public opinion also stands firmly against the idea. Only about a third of Germans support developing domestic nuclear arms. For now, Germany’s security remains anchored within NATO, protected not only by the United States but also by the nuclear capabilities of France and the United Kingdom.

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