It has been estimated that a liter of seawater contains as much thermonuclear energy as the chemical energy found in 350 liters of gasoline. Once science harnesses this truly inexhaustible energy source, it will be easier for humanity to expend a million kilowatt-hours of electricity on a task than for one person to work for just one hour.
With access to limitless reserves of powerful energy, people will not only heat their homes but also warm the waters of rivers and lakes, insulate the soil, and even alter the climate of entire countries. They will be able to melt mountains instead of blasting or crushing them. At that point, humanity will transform into a truly legendary force, one that nothing can withstand!