It got nowhere, and, while hydrogen may eventually become commercially viable for stationery sources, its use for transportation must still overcome some serious obstacles (including flammability and combustibility that is an order of magnitude greater than that of gasoline). America’s massive $787 billion fiscal stimulus, ostensibly designed to combat recession and create jobs (but so far ineffective) contained immense sums for subsidies to particular industries and technologies, almost $40 billion for clean-energy programs alone.