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Co-Benefits of CO 2 Mitigation for NO X Emission Reduction: A Research Based on the DICE Model

Xi Xie (), Yuwei Weng () and Wenjia Cai ()
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Xi Xie: School of Environment, Beijing Normal University, Beijing 100875, China
Yuwei Weng: Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing 100084, China
Wenjia Cai: Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing 100084, China

Sustainability, 2018, vol. 10, issue 4, 1-18

Abstract: Actions to reduce carbon emissions often entail co-benefits for environmental protection, like air pollutants reduction. Previous studies made contributions to estimate these co-benefits, but few considered the feedbacks from the socioeconomic system and the natural system. This paper extends the Dynamic Integrated model of Climate and the Economy (DICE) model, a classical Integrated Assessment model (IAM), into the Dynamic Integrated model of Climate, Air pollution and the Economy (DICAE) model. Through the hard link between a new air pollution module and the other modules in the original DICE, this paper quantifies the co-benefits of mitigating CO 2 emissions for NO X emission reduction, and compares the predicted climate change, economic output and social utility under seven mixed policy scenarios. In addition, uncertainty analysis based on Monte Carlo simulation is carried out to verify the robustness of the DICAE model. The results indicate that the NO X emissions co-emitted with CO 2 emissions would be over 0.6 Gt/year in a no-policy scenario. In policy scenarios, mitigating CO 2 emissions can simultaneously reduce at least 15% of the NO X emissions, and the more severe the climate mitigation target is, the more obvious co-benefits for NO X emission reduction. Although these co-benefits can offset some mitigation costs, it will not be cost-effective when NO X emission reduction is achieved completely depending on ambitious carbon mitigation, so the end-of-pipe technology for NO X emission is also indispensable. For policymakers, they should recognize the co-benefits of climate policies, actively taking mitigation actions. Moreover, they are encouraged to combine CO 2 mitigation with NO X emission reduction and coordinate their policy intensities to make wise use of the co-benefits.

Keywords: climate mitigation; co-benefits; air pollution; integrated assessment model; uncertainty analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q2 Q3 Q5 Q56 O13 (search for similar items in EconPapers)
Date: 2018
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