California's landmark efforts to increase solar power, supported by environmentalists, state leaders and the governor, could be in peril. In the next few months, PG&E, the largest utility company in the state, will reach the cap on how much solar energy it will buy back from customers. If the Legislature fails to pass a new bill raising that cap, new solar users in PG&E's territory won't be eligible for the benefits currents users enjoy, which some fear could bring the rise of solar energy in California to a grinding halt. "It will destroy the industry," said Ken Adelman, a retired...