Abstract: An extra super multi-story building having one piece of extra super multi-story of about 200 story construction, two pieces of extra super multi-stories of about 150 story construction and one piece of extra super multi-story of about 100 story construction. Each extra super multi-story includes two through four pieces of tower-like super multi-stories of about 50 story construction and of about 50 m in diameter (floor area: about 200 m.sup.2 /story). A sky lobby is provided about every 50 stories connecting the extra super multi-stories. Four shuttle elevators lead from the ground to the sky lobbies, and a sightseeing tower and high-rise garden (sky dome) are provided at the rooftop of the extra super multi-story building. Main facilities such as offices, hotels and residences are arranged in each extra multi-story.

Abstract: A fire sensing system, a process for sensing a fire and an environment monitor are disclosed. The system includes infrared sensors with sensing wavelength bands sensing an infrared radiation from an infrared source. One of the sensing wavelength bands is a CO.sub.2 -molecular resonance radiation wavelength band. The system determines whether a disastrous fire occurs or not on the basis of outputs of the sensors and a change in a ratio of the outputs. The process computes the temperature of the infrared source from a ratio of outputs of infrared sensors with at least two sensing wavelength bands of an infrared radiation from a monitored area, produces the intensity of infrared radiation of either of the bands from the computed temperature and computes a heating area from the intensity and the output of a corresponding infrared sensor. The process determines the progress of a fire.