https://www.business-standard.com/industry/news/india-eases-sulphur-norms-for-coal-plants-reversing-decade-old-mandate-125071200473_1.html India has reversed a decade-old mandate to install $30 billion worth of clean-air equipment, easing sulphur emission…
New perovskite-silicon solar cell pushes the limits of efficiency https://techxplore.com/news/2025-07-perovskite-silicon-solar-cell-limits.html by lebron8