Statement 1: The largest wave of urban growth in history is happening now. Since 2007, for the first time, the majority of the world’s population has been living in urban instead than rural areas (UN-Habitat, 2007). Rapid city growth is often uncontrolled and risky.
According to Roy (2009) by 2025 more than 90% of the new urbanites will locate in developing countries (UNFPA, 2007), which are already characterised by explosive growth of population, low stages of economic development and poor state of environment (Pugh, 2000).Statement 2: The former leads to a massive use of the available resources and the necessity to address scarcity. In fact, cities cover only 2% of the earth’s surface, yet consume 75% of all resources and produce 75% of all waste (UNFPA, 2007).
Statement 3: The former two lead to environment exploitation and consequent disasters, especially around urban areas. Urban sprawl fragments land cover, reducing ecosystem functions and increasing the probability of natural and man-made hazards.
Megalopoleis have captured much of the public attention, but most of the new growth will occur in smaller towns and cities, which have fewer resources to respond to the magnitude of change.
The conundrum is thus the following: can we achieve fast urban growth and development without destroying the Earth?