Today, seven members—the European Union, the United States, Japan, China, Russia, South Korea, and India—have formed an organization and invested in what is planned to be the world’s first reactor-scale fusion machine. By 2027, the France-based, multibillion-euro experiment known as ITER aims to produce 10 times the energy it consumes. In this interview, Osamu Motojima, the project’s director general, discusses the skepticism surrounding fusion as a practical energy source, the staggering costs of a large-scale fusion project, and the likelihood that ITER will be the silver bullet that slays the world’s future energy woes.
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