Funding for this research was provided by:
National Research Foundation of Korea (2019R1F1A1061120)
Korea Environmental Industry and Technology Institute (2020003030001)
Korea Institute of Energy Technology Evaluation and Planning (20174010201150)
Received: 20 July 2020
Accepted: 6 December 2020
First Online: 16 December 2020
: The authors declare that they have no competing interests.