pronged "advanced energy initiative." "It's got two major goals … first, to transform the way we power our cars and trucks, and secondly, to transform the way we power our homes and offices," Bush said. Covering what has become familiar territory in recent presidential speeches, Bush outlined the possibilities of hybrid, electric, hydrogen fuel cell and ethanol run cars. On powering homes and offices, he stressed the need to diversify away from natural gas. "The best way to do that is to expand our use of coal, nuclear power and renewable sources of energy like wind and solar," he said. The president praised advances in clean coal technology and expressed the need for new construction of nuclear energy plants. "I think we ought to start building nuclear power plants again. I think it makes sense to do so. The technology is such that we can do so and say to the American people, these are safe. And they're important," he said. Bush sounded a cautious note, however, on ways of ensuring developing economic powers like India and China have access to the benefits of nuclear power without developing the capacity to produce nuclear power themselves. "It makes sense that we share … the benefits of our knowledge with others, but not share the knowledge because there's concern about proliferation," he said. But Bush maintained an optimistic tone throughout, insisting "we're on the edge of some amazing breakthroughs, breakthroughs all aimed at enhancing our national security and our economic security and the quality of life of the folks who live here."