it's ambiguous in German as well, but both: a fusion reactor has very little radioactive waste (only the components that get hit by neutrons from the fusion rea

it's ambiguous in German as well, but both: a fusion reactor has very little radioactive waste (only the components that get hit by neutrons from the fusion reaction are activated, and hard-to-activate materials are being used there), and it's also less radioactive than the waste produced by a fission reactor.