The largest share of LA’s energy mix comes from natural gas. : Los Angeles is ditching a plan to rebuild several natural gas plants on the coast, Democratic Mayor Eric Garcetti said Monday night, but experts warn the decision to scuttle the plan will likely cause more blackouts across the city. Staffers at the Los Angeles Department of Water and Power (DWP) argued in December that the aging Scattergood, Harbor and Haynes power plants are critical to keeping the lights on in the city. They argue that eliminating plans to rebuild and refurbish the plants could seriously impact the grid.