About two dozen people protested Pacific Gas and Electric Co. in downtown San Francisco on Tuesday, accusing the embattled utility of being responsible for California’s deadliest and most destructive wildfire. Demonstrators began with a rally in Embarcadero Plaza before marching a few blocks to PG&E headquarters. Their chants included cries of “clean power to the people” and “PG&E, no more greed, we should own our energy.