advanced alternative fuels advanced biofuels air pollution autonomous autonomous vehicles biodiesel bioenergy biofuels car bans cities climate change decarbonization diesel electric vehicle electric vehicles emissions ethanol EV EVs fuel economy fuel efficiency gasoline greenhouse gas emissions greenhouse gases hybrid hydrogen ICCT IEA internal combustion engine LCFS low carbon fuels standard methanol mobility Paris agreement renewable diesel renewable energy Renewable Fuels Standard RFS SAF shipping sustainable aviation fuel transport zero emission vehicle zero emission vehicles zev