宇宙通鉴英文版上部第三回第三节( 七 )_

The volcanic eruptions filled the dense atmosphere with acid making it hard to survive on Venus' surface.

The venusians did not have the ability to colonize the planet on a large scale and Venusian leaders at all levels had no intention of abandoning the common people

So Venus ruler ordered all built underground urban residential venusians ordered the construction of a large number of spacecraft silo at the same time prepare the way for future large-scale interstellar migration.

The underground venusians lived on vitamins and fungi (like mushrooms) that didn't need light to grow. The clean air the clean water and the bright sky are all beautiful legends of the venusians.

Ten thousand years later the environment of Venus became worse. The wind howled acid rain kept coming and the acid waves kept rushing into the underground city of venusians. The situation was terrible.