Dom Atlantis is the floating capital city of Earth in the middle of the Atlantic Ocean. It is an aquatic arcology that extends several kilometers below the ocean surface. At the end of the 31st century, it had a population of more than 4.62 billion in a volume of half a million cubic kilometers, which was about 2% of Earth's and 0.4% of the population of Sol system.[1]
Beneath the city of Dom Atlantis lie gigantic pumps that redirect ocean currents, artifically maintaining the gulf stream and Europe's temperate climate.