The world’s power grids, 50 million miles’ worth, need a major overhaul Workers erect a steel tower at the 220kV line project in Jiangsu Province, China, on October 16th, 2023. | Photo by Costfoto / NurPhoto via Getty ImagesGovernments and utilities need to add or replace the equivalent of virtually all the world’s power grids by 2040 to reliably keep the lights on while cleaning up pollution from the power sector. …