This document presents a vision of future cities that are heavily influenced by science fiction ideas. It describes how current cities share similarities like air but face threats from population growth and climate change. The document envisions future overpopulated cities building a second floor to accommodate more people, with the lower city having poor living conditions and no sunlight, while the upper city is more balanced but divides people. To prevent this dystopian scenario, the document suggests respecting nature, promoting sustainability, and curbing excessive consumerism to reduce overpopulation and the need for multi-level cities.