Topic
Megacity
About: Megacity is a research topic. Over the lifetime, 1427 publications have been published within this topic receiving 26929 citations.
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TL;DR: In this paper, the authors present the current state of understanding of the air pollution problems in China's mega cities and identify the immediate challenges to understanding and controlling air pollution in these densely populated areas.
2,164 citations
TL;DR: Air pollution has serious impacts on public health, causes urban and regional haze, and has the potential to contribute significantly to climate change, yet, with appropriate planning, megacities can efficiently address their air quality problems through measures such as application of new emission control technologies and development of mass transit systems.
Abstract: About half of the world's population now lives in urban areas because of the opportunity for a better quality of life. Many of these urban centers are expanding rapidly, leading to the growth of megacities, which are defined as metropolitan areas with populations exceeding 10 million inhabitants. These concentrations of people and activity are exerting increasing stress on the natural environment, with impacts at urban, regional and global levels. In recent decades, air pollution has become one of the most important problems of megacities. Initially, the main air pollutants of concern were sulfur compounds, which were generated mostly by burning coal. Today, photochemical smog—induced primarily from traffic, but also from industrial activities, power generation, and solvents—has become the main source of concern for air quality, while sulfur is still a major problem in many cities of the developing world. Air pollution has serious impacts on public health, causes urban and regional haze, and has ...
591 citations
Book•
25 Aug 1995
TL;DR: In this paper, a collection of 17 original studies is concerned with both theoretical and practical aspects of the growing importance of the major international cities in the global economy and their demands as special places in need of specific urban policies.
Abstract: This collection of 17 original studies is concerned with both theoretical and practical aspects of the growing importance of the major international cities in the global economy. The studies "examine the nature of world cities and their demands as special places in need of specific urban policies; the relationship between world cities within global networks of economic flows; and the relationship between world city research and world-systems analysis and other theoretical frameworks." The studies are organized into three parts which cover the hypothesis and context of the world city cities in systems and politics and policy issues. (EXCERPT)
552 citations
TL;DR: In this article, the authors identify the different processes and mechanisms of urbanization that substantially affect urban structures as well as human behavior, and find that various mechanisms within the different sectors of the economy lead to a substantial increase in urban energy demand and to a change in the fuel mix.
496 citations
TL;DR: In this paper, the potential for air pollution that cities will experience in the future unless control strategies are developed and implemented during the next several decades is mapped and analyzed in 20 of the 24 megacities of the world (over 10 million people by year 2000).
495 citations