Gov. Jerry Brown unveiled on Thursday his plan for spending cap-and-trade revenue, prioritizing cleaner vehicles and improving air quality. Roughly $1.5 billion, all generated by the sale of permits required to release greenhouse gases into the atmosphere, is available to be spent by the governor and lawmakers. Brown wants the biggest chunk of the money, $607.5 million, to be used on financial incentives for cleaner cars, trucks, buses and farm vehicles.