The board also approved a proposal to study the feasibility of joining Marin County's renewable energy program - a change that, if eventually adopted by the city, would shake PG&E's decades-old monopoly on providing San Francisco residents their power. Avalos said a CCA program could ultimately save ratepayers money and is San Francisco's best chance to reduce its greenhouse gas emissions and fight climate change. State law requires the city to allow utilities to use the public right of way for such equipment, but under Wiener's proposal, AT&T would have to propose multiple locations for each box, at least attempt to place the boxes on private property or in alleyways, allow artwork on the boxes and pay for greening around them. The utility insists that the legislation is illegal under state law, but Wiener said it would offer both utilities and the public clarity in what's become a confusing and contentious process.