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ID:
085943
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| Publication |
2008.
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| Summary/Abstract |
We shall focus on preventing and controlling atmosheric pollution and on protecting the sources of drinking water and bring about a marked improvement in the quality of the urban environment and the state of the ecology by means of such measures as readjusting the conomic structure, enhancing high-quality and clean energy sources, setting strict standards for the emission of pollutants, and strengthening environment protection and construction.
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| 2 |
ID:
137713
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| Summary/Abstract |
Drawing on recent research in urban policy studies and social studies of technology, this paper examines the capability of urban energy regimes in adapting to environmental policy pressures. Focusing on the case of the City of Los Angeles, we critically analyze the transformative capacity of the city׳s recent energy and climate policies and the innovation patterns of its urban infrastructure regime. This case study suggests that despite considerable success in switching from coal to renewable energies, the patterns of sociotechnical change in Los Angeles still tend to supplement and sustain the existing regime. Sociotechnical change in Los Angeles tends to unfold incrementally through adjustments within the established patterns of the existing regime.
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| 3 |
ID:
068993
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| 4 |
ID:
161832
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| Summary/Abstract |
Urban road infrastructure is crucial in affecting air pollution. Yet, little is known about the roles played by road width vs road length. This paper attempts to fill this gap by estimating the effects of road infrastructure on PM10 using city-level data from China. Our robust modeling results show that the road density index, defined as the ratio of road surface area to city territory size, is negatively correlated with PM10. More importantly, when the road width and length components of the road density variable are separately included in the regression models, the width is found to be significantly and negatively correlated with PM10, whereas the correlation with the length variable is insignificant. This is expected as increases in road width can help mitigate congestion, improve fuel efficiency, and thus reduce emissions. On the contrary, extending roads to new or unconnected areas is likely to bring more vehicles onto the roads and extend average driving time. Our findings appeal for careful consideration of the trade-off between road width (lane numbers) and road length when planning and constructing urban road infrastructure.
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| 5 |
ID:
076907
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