A city has innumerable functions,and various forms have been developed to meet the needs of those functions.
It is nothing but our "brain" that has created all these functions, forms and systems.

In a place called "city" everything,literally everything,is affected by our brain. Even nature within the city,though very little,cannot escape from the decision making process of our brain,which determines where to plant trees and flowers and which trees and flowers are to remain.

The brain now tries to engulf everything on earth in its own way, according to to its own image. This has resulted in environmental destruction; a fact we have not realized until quite recently. Yet no one can answer one fundamental question;why our brain allows such disastrous consequence？

If the brain fully extends itself, it will be unable to bring its attention to "nature" that is left in the end, and the brain will consequently be destroyed by "nature" the last survivor.

The brain can cover most of whatever exists on earth，but it can never reach 100％. By the last survivor I mean our body. As human bodies are severely damaged by ruin of the ecosystem and die because of it, our brain will also follow down the path of ruin. Nature that you must avenge for a brain, is a body that supports a brain.