The U.S. Department of Energy will spend millions of dollars to help develop hydrogen fuel cell vehicles and raise public awareness about the technology that drives them. The agency on Wednesday announced two separate five-year fuel cell agreements: an $88 million pact with General Motors and a $70 million deal with DaimlerChysler. The Energy Department said it wants the programs to foster technology development and raise awareness about the vehicles, whose fuel cells use hydrogen to generate electricity that propels them.