(Bloomberg) -- Pushback over rising customer power bills risks slowing the purge of fossil fuels from electric grids, according to the head of one the largest US power companies.Most Read from BloombergBYD’s New $233,450 EV Supercar to Rival Ferrari, LamborghiniJack Ma-Backed Ant Outbids Citadel Securities for Credit Suisse’s China JVNorwegian Cruise Ship Halted at Mauritius Due to OutbreakZelenskiy Says 31,000 Troops Killed as Ukraine Seeks US Aid Decision Within Month“To clean the grid is goin