Abstract
The manufacturing and construction industries have significantly contributed to the increase of carbon dioxide (CO2) emissions. Environmental Kuznets curve (EKC) hypothesis is widely leveraged to analyze the peak of CO2 emissions, which is considered as a pivotal step for the effective CO2 emission reduction in previous studies. This study tests the EKC hypothesis using the data of CO2 emissions of manufacturing and construction industries from 121 countries throughout 1960–2014, and turning points (TPs) are calculated for the countries where EKC hypothesis is validated. The results show that the EKC hypothesis was validated by 95 out of 121 countries, among which, 13 countries have not reached any of the three TPs, 11 countries have reached the first-step TP (TPCI), 21 countries have reached the second-step TP (TPPC), and 50 countries have reached the third-step TP (TPTC). Moreover, the result of examination of the EKC existence at four income levels indicates the higher-income nations own a higher proportion of countries validates the EKC hypothesis and reach the TP. These findings help policy-makers analyze the TP status quo and generate step-wise strategies for national CO2 emission reduction of manufacturing and construction industries.
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