A pioneering reactor in Britain is gearing up to start pivotal tests of
a fuel mix that will eventually power ITER €” the worlds biggest
nuclear-fusion experiment. Nuclear fusion is the phenomenon that powers
the Sun and, if physicists can harness it on Earth, it would be a source
of almost limitless energy.

https://www.nature.com/articles/d415...b-global-en-GB

'Limitless enenergy' Sounds exciting and promising if it works..