The issue of global warming and global climate change as mainly caused by transboundary air pollutants has emerged since the middle of the 1970's. To some extent, the impacts of global warming and global climate change are still considered uncertain by a great many nations. However, several environmental catastrophes have been proved highly related to the release of certain noxious emissions creating global warming and global climate change. Global warming is presently one of the most threatening environmental issues facing the world. Although, the uncertainty of the issue is still high, the United Nations Organization, based on precautionary principle, concluded the 1985 Vienna Convention for the Protection of the Ozone Layer (hereinafter cited as the Ozone Convention), the 1987 Montreal Protocol on Substances that Deplete the Ozone Layer and the United Nations Framework Convention on Climate Change in 1992. ASEAN has not done much to implement the Ozone Convention and the Climate Change Convention in the region. ASEAN tended to pass soft laws rather than hard laws to deal with transboundary atmospheric pollution, especially resulting from land and forest fires. The book is, therefore, necessary to examine a specific regional environmental policies and laws dealing with global warming and climate change in Southeast Asia. ASEAN (the Association of Southeast Asian Nations), as a fairly big regional cooperation with a great many environmental problems, is chosen as examples on how a region implements international treaties coping with the issues of global warming and climate change and on what prospects a region might have in tackling the issues.