Grey relation analysis of industrial CO2 emissions in Taiwan

In this paper we use grey relation analysis to examine the interrelationships among energy-induced CO2 emission, production and energy consumption of 34 industries in Taiwan during 1981-1994, and to identify key factors affecting emission changes. Results indicate that production has the largest relation with CO2 emissions, and electricity consumption is second. We further classify the industries into eight types according to relational grades of their production and the total energy factors, and find that the aggregate CO2 intensities reduced slightly. This was mainly due to substantial reductions of energy intensity in some major CO2 emission sources.