Here is one way to squeeze energy from nuclear fusion: create and contain a roiling soup of ionised hydrogen atoms known as a plasma, and heat it to ten times the temperature of the sun's core. Some of the fast-moving atomic nuclei will bash together with enough oomph to fuse. Gather the energy from fast-moving particles created in these collisions and you have a limitless (for hydrogen is abundant), comparatively clean energy source. It is an idea conceived in the 1950s, but yet to be born in a laboratory.
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