Carlo Ratti Associati (CRA) and Milan-based architect Italo Rota have joined forces with Rome-headquartered global energy behemoth Eni to explore the carbon-free potential of magnetic confinement fusion energy at a pop-up exhibition installed at this year’s just-concluded Maker Fair Rome. The spherical pavilion is realized as an ersatz tokamak fusion reactor within Gazometro Ostiense, a landmark gasholder site in Rome. First conceptualized in the Soviet Union in the 1950s, tokamak…