Jong Beom Kwon¹, Huiyun Kim², Jinbeom Choi², Jeewon Jeon³, Kyungjin HAN⁴, Sooyoul Kwon⁵ and Young Kim⁴, (1)Korea University, Program in Environmental Technology and Policy, Seoul, South Korea, (2)Korea University, Program in Environmental Technology and Policy, Sejong, South Korea, (3)Korea University, Department of Environment Engineering, Sejong, South Korea, (4)Korea University, Department of Environmental Engineering, Sejong, South Korea, (5)Korea National Open Univ., Department of Environmental Health, Seoul, South Korea