Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Fusion power is the power generated by nuclear fusion processes, which two light atomic nuclei fuse together to form a heavier nucleus. would provide much more energy for a given weight of fuel than any technology currently in use, and the fuel itself, primarily deuterium, exists abundantly in the Earth's ocean: about 1 in 6500 hydrogen atoms in seawater is deuterium. However, in 2010, more than 60 years after the first attempts, it was estimated that commercial power production was still unlikely before 2050. Learn more about the principles of nuclear fusion as an energy source and the reactors and experiments currently in operation or under construction in this book.