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CERN's Large Hadron Collider has started supplying waste heat to the French town of Ferney-Voltaire, providing heating for several thousand homes through a new heat exchange system. This initiative, which began in mid-January, aims to reduce CO2 emissions and could potentially double its output when fully operational. However, the LHC will enter a Long Shutdown 3 in mid-2026, temporarily decreasing heating capacity, while CERN also plans to implement additional waste heat recovery projects.