During the past four decades Los Angeles and Hong Kong have come to play a critical role in the flow of goods, people, and capital; in the changes in production and consumption; and in the urban environmental issues that have taken root as a result of the changes they have experienced. The book evaluates the issues associated with those changes, including how LA and Hong Kong have become connected to China and its key urban regions such as Shenzhen and Guangzhou in the Pearl River Delta. Los Angeles, Hong Kong, and several of China’s mega-cities have become global in their activities and reach through their financial, political and economic roles as well as the cultural, environmental, and demographic shifts that have taken place. The book documents the history and protracted nature of six urban environmental issues in Los Angeles, Hong Kong, and China. These include ports and freight traffic (or goods movement), air quality, water supply and water quality, the food environment, transportation, and open and public space. It identifies contrasting development patterns, important similarities, and comparative trends and strategies. The book further analyzes how urban environmental issues have risen to the top of the policy agendas in Los Angeles, Hong Kong, and China, where and how changes are being explored and where change is possible, and where and how such changes have been blocked or undermined.