Since the 1992 ‘Joint Declaration of South and North Korea on the Denuclearization of the Korean Peninsula’ was agreed, various negotiations and policies have been conducted. There were policies such as CVID, Strategic Patience, Top-Down Approach, Calibrated Practical Approach, Audacious Initiative and the Geneva Agreement, and 9.19 Joint statement by the six-party talks were signed to denuclearize Korean Peninsula. However, starting with the first nuclear test in 2006, North Korea conducted six nuclear tests to develop atomic bombs, boosted fission bombs, ICBMs, and SLBMs to enhance its weapon capabilities. In addition, nuclear security crisis on the Korean Peninsula has been rising day by day as signs of restarting the North Korea’s Yongbyon 5MWe Graphite-moderated reactor were observed and the possibility of a seventh nuclear test have been increased. Since North Korea’s nuclear issue has a lot of influence on international security, especially on the Northeast Asian countries, a realistic denuclearization policy that reflects North Korea’s current domestic situation along with the international situation is needed. It’s been six months since Russia invaded Ukraine on February 24, 2022. The war between Russia, which has nuclear weapons, and Ukraine, which gave up its possession of nuclear weapons due to the Cooperative Threat Reduction (CTR) program known as the Nunn-Lugar program, is expected to have a significant impact on North Korea, which is considering denuclearization due to UN sanctions on North Korea. Therefore, in this study, based on the war patterns of Russia-Ukraine war, perspective on how it could affect North Korea’s denuclearization is analyzed. Also, significance and limitations of the previous nuclear negotiations, the North Korea’s political regime, the ‘five-year strategy for North Korea’s economic development’ and the ‘five-year plan for North Korea’s economic development’ were analyzed to suggest practical DPRK’s denuclearization policy.

As a result of the increasingly serious air pollution worldwide, there are many social costs in the country. In general, there are legal measures to improve air quality such as investment projects, input of public funds, attraction of private capital, and regulation of air pollution prevention. In this study, we propose future legislative policies through the following analysis on the status of various researches in domestic and foreign countries for the improvement of air quality and related legal system. The domestic indoor air quality is getting better through ongoing management. From a legal perspective, The air quality law, such as indoor air quality law and environmental law, has been continuously revised to improve indoor air quality. However, contrary to the air quality law, indoor air quality management is carried out by various related departments under current law. Due to the different management facilities and management standards of each ministry, the effectiveness of relevant laws is deteriorated in organically managing multi-use facilities. This may lead to confusion and may be an impediment to the effective achievement of the institution's objectives. The pollutants of interior space are one of the main causes not only building materials, but also office equipment such as computers. however, The pollutants to be managed under the current legislation are mainly limited to building materials. In addition, the criteria set for each pollutant have a problem that it depends on the after-regulation standard that is made after the pollutant is released from the pollutant source. There is a need for systematic analysis and research to prevent adverse effects that may occur due to pollution sources through the prevention system. It is time to change the direction of regulation-oriented policies and to make policy changes that can improve air quality through systems such as emission trading system..

바이오에탄올의 경제적 영향을 분석하기 위하여 시계열 자료를 이용하여 수요함수를 분석한 결과, 통계적으로 의미 있는 모형을 얻을 수 있었다. 추정된 수요 모형에 있어서 바이오에탄올의 수요 탄성치는 탄력적인 것으로 나타났으며, 가솔린과 불완전대체관계를 가지는 것으로 분석되었다. 추정된 모형을 바탕으로 수요함수를 재구성하여 가격 변화 시나리오에 따른 물량의 변화를 분석한 결과, 바이오에탄올의 가격이 탄력적인 상황에서 가격을 증가시켰을 때, 상대적으로 큰 폭으로 수요량이 감소하였으나 대체재 가격의 증가로 인해 바이오에탄올의 수요량이 감소하는 것을 상쇄시켜 반대로 바이오에탄올의 수요량이 증가하였다.