The Shanghai World Expo has made a splash in China and sent ripples around the world. Two hundred years ago, only about 2% of the world´s population lived in cities; now it´s more than half. The rate of urbanization is increasing even faster in the developing countries. Shanghai is the largest city in China. Shanghai Expo´s theme is “Better City - Better Life”. How to make the city more habitable? How to reduce the harm that city life has on the environment? These are global issues, and also Shanghai´s issues.