PL
The first examples of ecological cities may be found in the towns built along Ebenezer Howard’s concept of the garden city and also in the urban settlements erected along the lines of Clarence Perry’s neighbourhood unit model. It turns out, that some ideas featured in the garden city formula have retained their appeal in the 21st century, too. Initially, the concept was related to the natural environment conservation and meant using the latest technological developments and cutting-edge products to protect the environment and improve the conditions of human existence, but later on the idea of an ecological city merged with intelligent city to become one complex and multi-dimensional concept.