Cold Fusion

Scientists believe that fusion energy—which generates electricity in the same way that the sun creates energy—has the potential to provide the world with an almost limitless, clean source of power.
But while it is known that fusing two lighter atomic nuclei to form a heavier nucleus releases energy, it is far more difficult to harness that power. In order to do so, they would have to create plasma hotter than the sun that could be stably confined.

Scientists are edging closer to creating fusion energy