Here & Now's Robin Young speaks with Richard Pacelle, professor of political science at the University of Tennessee, to find some answers.
The world’s most ambitious attempt to harness fusion as a source of nuclear power is taking shape in the south of France.
Fusion is the process that drives the sun — atoms are forced together to release energy. Repeating it here on Earth could, in theory, offer an almost endless supply of electricity.
The BBC’s David Shukman reports.