New plans to support the sales and use of alternative-fuel vehicles, including cars and trucks that run on hydrogen and natural gas instead of just those that run on electricity, were announced by President Obama. Mr. Obama also proposed increasing the current $7,500 tax credit for advanced technology vehicles to a maximum of $10,000 that would be broadened to include more than plug-in cars. Speaking at a Daimler truck factory, the president proposed a 50% tax credit to cover the additional cost of alternative fuel trucks.