Los Angeles’ infamous smog problems made it the frontline in a successful war on tailpipe emissions, but even a full switch to electric cars may not completely eliminate air pollution in the city, a new UC Berkeley study suggests. With vehicle emissions declining, plants are emerging as the major source of particulate hydrocarbon…Los Angeles’ infamous smog problems made it the frontline in a successful war on tailpipe emissions, but even a full switch to electric cars may not completely eliminate air pollution in the city, a new UC Berkeley study suggests. With vehicle emissions declining, plants are emerging as the major source of particulate hydrocarbon…Los Angeles’ infamous smog problems made it the frontline in a successful war on tailpipe emissions, but even a full switch to electric cars may not completely eliminate air pollution in the city, a new UC Berkeley study suggests. With vehicle emissions declining, plants are emerging as the major source of particulate hydrocarbon…Los Angeles’ infamous smog problems made it the frontline in a successful war on tailpipe emissions, but even a full switch to electric cars may not completely eliminate air pollution in the city, a new UC Berkeley study suggests. With vehicle emissions declining, plants are emerging as the major source of particulate hydrocarbon…