With the extension of California’s landmark climate change law stalled, a legislative plan is emerging to significantly up the ante on California’s commitment to electric vehicles by requiring that 15 percent of all new automobiles be emission-free within a decade. Assemblywoman Autumn Burke, D-Los Angeles, told The Associated Press on Friday that she’ll introduce legislation next week to ramp up the pressure on carmakers. Automakers that fail to sell enough electric vehicles would be required to make payments to rivals that do or pay a fine to the state.