Atas's ecosystem
The surface of Atas is completely desertified, water is scarce, and vegetation is rare. There are about 4ooo thousand intelligent beings living on the entire planet Attas, including rare races such as humans, elves, Moors, dwarves, mantismen, and birdmen.
On the planet Attas, more than 7o% of the land is completely uninhabited. There are two types of no-man's land, one is the deep desert where there has been no rain for hundreds of years. One is the seabed that was left behind after the ancient oceans dried up, covering several meters of salt layers.
The grain and food output on Atas was only about one percent of that of the Earth in the 12th century. The reason why such a small amount of food can supply a population of 4ooo is that the Atas people have a natural specialty of "micrometabolism", and their average daily food intake is only about 1/1o of that of human beings on earth.
The nomadic democracy on Atas had to graze two kinds of lizards and one insect. Lizards provide meat and leather. Strange large insects called "shell beetles" provide nectar.
The "Shell Beetle" is a bizarre insect on the Attas, about the size of a mini-cooper (or Chery QQ). It is a social insect, similar to ants and bees. After the nomads caught the shell beetles, they forced the workers to collect vegetation to make nectar, and of course the soldiers killed them.
But Atas has a wealth - oil.
Ancient Atas was home to forests and oceans all over the world, after the planet was completely desertified. These organisms are buried underground in the desert and evolved over millions of years to form oil and coal.
Anaerobic bacteria live underground. Geothermal energy is used as an energy source to decompose oil/coal to sequester carbon. This process breaks down the water. So under Atas there is an abundance of groundwater and even an underground ocean. It's just that with the current level of science and technology of Artas, the surface people can't mine it at all.
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