Greening Cities Experiences

[[abstract]]The face of modern large cities has been changing and evolving in recent years in size, population density, activities, transportation, infrastructure, carbon emission, and sewage water, garbage production or needs. Asia and other fast developing economies and population may lead the way with the fastest population growth in the world in the coming decades and reach 70% of global population. Increasing attention and interest has being given to garden and parks. More recently, urban green spaces have been identified as being vital for balance in lifestyle, health. They also have a role to play in the social arena and community life, such as landscaping or enhancing the visual aesthetics of natural landscapes; trees and plants mitigate someway GHG by fixing Carbon emission; and moreover green spaces create relaxing recreational spaces in metropolitan areas provide opportunities for social activities for people living or working in the neighbourhood. When we look at recent history on East Coast of the United States, just a century ago we saw bitumen roads, concrete, steel, glass, buildings and infrastructures transforming cities. While suburbs came into existence expanded, replacing farmlands and fields into metropolis. There has been an interesting evolution of innovative and creative green solutions, such as the use of the balcony or roof for gardens or farms, green walls, small size orchards with water basins across the cities, vegetable garden parks open to public leisure gardening or, vertical farms inside building (Tokyo, Paris, Taiwan...). Green architectural microalgae bioreactors cultures on Paris left bank surface wall, on highways (Switzerland) producing value added biomass by using photonic energy to capture carbon dioxyde remediation obligation in the future; Microalgae multiple output and by- products may turn out as an important income contributor for skyscrapers management. Greening cities case studies might show promising results on paths to improve environment, quality life, simultaneously, create new perspectives and economical opportunities for sustainable societies. The case studies from Taiwan are interesting for other cities in both the East and West incite for further discussion and debate on what greening can be bring into urban infrastructure and on the right equilibrium component share to adopt for future planning, and the implications for building as a greening process[[notice]]補正完