The Central Role of Energy in the Urban Transition: Global Challenges for Sustainability
Joseph R. Burger, James H. Brown, John W. Day Jr., Tatiana P., Flanagan, Eric D. Roy

TL;DR
This paper analyzes global data to show how urbanization correlates with increased energy use, economic growth, and CO2 emissions, highlighting challenges for sustainability amid rapid urban transition.
Contribution
It provides a comprehensive analysis of global and historical data linking urbanization with socio-economic and environmental changes, emphasizing energy's central role.
Findings
Per capita GDP, energy use, and CO2 emissions increase with urbanization.
Urban economies shift from resource-based to service-based sectors.
Historical U.S. data mirror global urban transition patterns.
Abstract
The urban transition, the increased ratio of urban to rural population globally and within countries, is a hallmark of the 21st century. Our analysis of publicly available data from the World Bank spanning several decades for ~195 countries show that across and within nations over time, per capita Gross Domestic Product (GDP), energy use, and CO2 emissions are lowest in predominantly rural countries (rural > urban pop.), increase rapidly across urbanizing countries (rural urban pop.) and are highest in the most urban countries (rural < urban pop.). These trends coincide with changes in employment by sector and gender. Rural economies are based largely on employment in the resource-extraction sector, which includes agriculture, fisheries, forestry, and mining. In urbanizing nations, male employment is predominantly in the industrial sector, including public utilities, while female…
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