『Abstract
A complete understanding of the resource consumption, embodied
energy, and environmental emissions of civil projects in China
id difficult due to the lack of comprehensive national statistics.
To quantitatively assess the energy and environmental impacts
of civil construction at a macro-level, this study developed a
24 sector environmental input-output life-cycle assessment model
(I-O LCA) based on 2002 Chinese national economic and environmental
data. The model generates an economy-wide inventory of energy
use and environmental emissions. Estimates based on the level
of economic activity related to planned future civil works in
2015 are made. Results indicate that the embodied energy of construction
projects accounts for nearly one-sixth of the total economy's
energy consumption in 2007, and may account for approximately
one-fifth of the total energy use by 2015. This energy consumption
is dominated by coal and oil consumptions. Energy-related emissions
are the main polluters of the country's atmosphere and environment.
If the industry's energy use and manufacturing techniques remain
the same as in 2002, challenges to the goals for total energy
consumption in China will appear in the next decade. Thus, effective
implementation of efficient energy technologies and regulations
are indispensable for achieving China's energy and environmental
quality goals.
Keywords: Construction in China; Economic input-output LCA; Embodied
energy and environmental emissions』
1. Introduction
2. Methodology
2.1. Conceptual basis of LCA
2.2. I-O LCA
3. Model development
3.1. Correlated sectors
3.2. Energy and environmental emission intensity
3.3. Assumptions for the scenarios evaluated
4. Results and analysis
5. Conclusion
References