The Happy Birth and Timely Death of the MetroCard

Carbon Neutral Regulation in AI Training

The retirement of the MetroCard as the ball dropped on New Year’s Eve was bittersweet for me. In 1983, as a young lawyer, I took a year’s leave of absence from my law firm to serve as special counsel to Richard Ravitch, chairman of the MTA. He gave me the task of leading a […]

The year 2025 saw the return to power of Donald Trump, a jewellery heist at the Louvre museum in Paris and an engagement that “broke the internet”. Amid the biggest stories of the year, climate change research continued to feature prominently in news and social media feeds. Using data from Altmetric, which scores research papers […]

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The membrane performed well over multiple filtration cycles, and could be cleaned and reused thanks to a methodical backwashing system. Researchers have created a new two-layer membrane filtration system that can significantly reduce the amount of micro and nanoplastics that leak from landfills into local water basins. The group – at the University of British […]

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Laser cladding is “a highly promising alternative for rail repair,” said Kate Tomlinson of the University of Sheffield. Field demonstrations of laser cladding technology hosted by the University of Sheffield Rail Group have shown how additive manufacturing can repair railway infrastructure and provide superior wear resistance. Working in collaboration with British Steel and Technogenia UK […]

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The AiroVive® system deployed at a water treatment facility (image credit: Probe Industries). A new product offering in the odour control space appears unusual in its combination of industrial odour neutralisation with deliberately designed “mood-enhancing” fragrances. The AiroVive® from Probe Industries is said to be the world’s first industrial odour enhancer that combines a biodegradable, […]

Coal power generation fell in both China and India in 2025, the first simultaneous drop in half a century, after each nation added record amounts of clean energy. The new analysis for Carbon Brief shows that electricity generation from coal in India fell by 3.0% year-on-year (57 terawatt hours, TWh) and in China by 1.6% […]

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Dŵr Cymru Welsh Water will roll out hundreds of Flygt Concertor intelligent pumping systems, following a successful deployment which delivered energy savings of 40%. The project demonstrates the evolution of pumping, writes Synneve Henningson, senior product manager, Xylem. As part of its commitment to enhancing customer service and protecting the environment, Dŵr Cymru Welsh Water (DCWW) is significantly […]

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Biochar: from agricultural waste byproducts to novel adsorbents for ammonia and micro/nanoplastics (MNPs) (image credit: Ruogu Tang, Siyu Qiu, Changqing Wu & Juzhong Tan) Corn cob biochar shows promise for removing ammonia and microplastics from contaminated water, offering a low cost, climate friendly tool for future treatment systems. Researchers at the University of Delaware have […]

Welcome to Carbon Brief’s DeBriefed. An essential guide to the week’s key developments relating to climate change. This week US to pull out from UNFCC, IPCC CLIMATE RETREAT: The Trump administration announced its intention to withdraw the US from the world’s climate treaty, CNN reported. The move to leave the UN Framework Convention on Climate Change […]

The Trump administration in the US has announced its intention to withdraw from the UN’s landmark climate treaty, alongside 65 other international bodies that “no longer serve American interests”. Every nation in the world has committed to tackling “dangerous anthropogenic interference with the climate system” under the 1992 UN Framework Convention on Climate Change (UNFCCC). […]

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Image credit: lev radin / Shutterstock.com The US Trump administration announced on 7 January that it would withdraw from the United Nations Framework Convention on Climate Change (UNFCCC), the multilateral treaty that commits signatories to recognize climate change as an international concern, and also the formal venue for global climate talks. It is the first […]

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Oil tankers leased by Chevron at the Bajo Grande refinery on Lake Maracaibo in September 2025 (Image credit: Jose Bula / Shutterstock.com). Donald Trump’s confidence that the Venezuelan oil industry can be revived by US companies understates a complex situation. The challenge extends beyond the severely dilapidated state of infrastructure to include profound institutional decay […]

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Artificial intelligence has captured headlines recently for its rapidly growing energy demands, and particularly the surging electricity usage of data centers that enable the training and deployment of the latest generative AI models. But it’s not all bad news — some AI tools have the potential to reduce some forms of energy consumption and enable cleaner grids. […]

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Every autumn, as the Northern Hemisphere moves toward winter, Judah Cohen starts to piece together a complex atmospheric puzzle. Cohen, a research scientist in MIT’s Department of Civil and Environmental Engineering (CEE), has spent decades studying how conditions in the Arctic set the course for winter weather throughout Europe, Asia, and North America. His research […]

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KNF’s Alexander Heizler and Martin Becker Effective from January 2026, Alexander Heizler assumes the role of Chief Executive Officer (CEO) at diaphragm pump manufacturer KNF. He has been with the company since 2009 and served as Chief Operating Officer (COO) from 2021. The group said his appointment ensures continuity and reflects KNF’s commitment to long-term […]

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Gas sensors developer Alphasense has introduced what’s said to be the world’s first galvanic lead-free oxygen sensor (O2-A2-GLF) for industrial safety applications. The O2-A2-GLF sensor is engineered as a direct replacement for existing two-pin oxygen sensors used in portable and fixed gas instruments. It is designed to deliver reliable performance in demanding industrial environments, maintaining […]

The US, which has announced plans to withdraw from the global climate treaty – the UN Framework Convention on Climate Change (UNFCCC) – is more historically responsible for climate change than any other country or group. Carbon Brief analysis shows that the US has emitted a total of 542bn tonnes of carbon dioxide (GtCO2) since 1850, by […]

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The James M. and Cathleen D. Stone Center on Inequality and Shaping the Future of Work officially launched on Nov. 3, 2025, bringing together scholars, policymakers, and practitioners to explore critical questions about economic opportunity, technology, and democracy. Co-directed by MIT professors Daron Acemoglu, David Autor, and Simon Johnson, the new Stone Center analyzes the forces that contribute to growing […]