Before the most of the population lives in rural countryside, Only 10 percent of the population lives in urban areas. But now the growth of the megalopolis attracts people to poured into the town. From 25 megacities around the world predict that in the future people will be flooding in urban areas, causing problems of congestion and environmental.
The population in the area only 2 percent of the world but use three quarters of resources. Many human activities causing pollution of soil, water, air. The solution in the concept that a move people back to the rural is impossible. The best choice is creating a community in new ways to be livable.
The two main concepts by government are more recycling and fewer cars. Construct the buildings that can make energy, Designed for urban living and working closely, Encouraging the public to use the bus or public transport etc.