Mass Hydration is a technology on the Exploration and Expansion technology tree with a research cost of 36000 . It unlocks two Planet Improvements, requires research in Negative Mass Mechanics or in Complex Regulated Systems, and allows further research in Sustainable Supercities and Endless Empire.
"High-volume condensation, large-scale dehydration synthesis, and planetary temperature regulation are all various parts of a series of complex and expensive processes needed to create a 'wet' planet. The energy cost and the difficulty of doing it to scale make this a very difficult effort."
"Changing any planet type into a world as rich and vibrant as a jungle requires time, dedication, and extremely sophisticated bioengineering. A masterpiece of applied genetics, artificial evolution, and resource utilization, this transformation is only available to the most advanced societies."
"Water. An atom of oxygen bound to two simple hydrogens; something minimal and simple but necessary on the scale of a few trillion cubic kilometers to create an ocean world. While the result is a planet potentially wealthy in life and resources, it is not a project for the faint of heart."