An overflow crowd turned out for a hearing held Saturday by local and state officials, including Congressman Gary Miller.
Residents are furious over a Southern California Edison project they say is hurting their property values and putting their health at risk.
High-voltage, 200-feet-tall transmission towers now line several residential neighborhoods. It's all part of a project to generate more renewable energy.
"Chino Hills is suffering from much more than property value loss. From personal strain and emotional worry to physical illness, SCE has created a community of fear and trepidation," said Bob Goodwin with the organization, Hope for the Hills.
Activists want the lines rerouted either underground or through a nearby state park. Edison says that's too expensive and insists the towers are safe.