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The Association for Computing Machinery, the world's largest society of computing professionals, announced that all publications and related artifacts in the ACM Digital Library will become freely available to everyone starting January 2026. Authors will retain full copyright to their published work under the new arrangement, and ACM has committed to defending those works against copyright and integrity-related violations. The transition follows what ACM described as extensive dialogue with authors, Special Interest Group leaders, editorial boards, libraries, and research institutions globally. Students, educators, and researchers at institutions of all sizes -- from well-resourced universities to emerging research communities -- will gain unrestricted access to the full catalog of ACM-published work. The Digital Library houses decades of computing research across journals, magazines, conference proceedings, and books.

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More carbon dioxide in the environment is making food more calorific but less nutritious -- and also potentially more toxic, a study has found. From a report: Sterre ter Haar, a lecturer at Leiden University in the Netherlands, and other researchers at the institution created a method to compare multiple studies on plants' responses to increased CO2 levels. The results, she said, were a shock: although crop yields increase, they become less nutrient-dense. While zinc levels in particular drop, lead levels increase. "Seeing how dramatic some of the nutritional changes were, and how this differed across plants, was a big surprise," she told the Guardian. "We aren't seeing a simple dilution effect but rather a complete shift in the composition of our foods... This also raises the question of whether we should adjust our diets in some way, or how we grow or produce our food." While scientists have been looking at the effects of more CO2 in the atmosphere on plants for a decade, their work has been difficult to compare. The new research established a baseline measurement derived from the observation that the gas appears to have a linear effect on growth, meaning that if the CO2 level doubles, so does the effect on nutrients. This made it possible to compare almost 60,000 measurements across 32 nutrients and 43 crops, including rice, potatoes, tomatoes and wheat.

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