Steven Chu, director of Lawrence Berkeley National Laboratory and a Nobel laureate in physics, has advocated for energy thrift. During a September visit to Washington, D.C., he spoke with senior editor Janet Raloff about how he believes the United States can tackle what he sees as a looming energy crisis. You’ve said the United States needs to launch an energy research program that’s comparable to the Apollo mission. What did you mean? That we need big investments and that our country needs to act quickly. In that respect, the programs would be similar. But the Apollo miss...

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