The ASEAN Agreement on Transboundary Haze Pollution is a legally binding environmental agreement signed in 2002 by the member states of the Association of Southeast Asian Nations to reduce haze pollution in Southeast Asia. The Agreement recognises that transboundary haze pollution which results from land and/or forest fires should be mitigated through concerted national efforts and international co-operation. As of September 2014, all ten ASEAN countries have ratified the haze agreement. History The agreement is a reaction to an environmental crisis that hit Southeast Asia in the late 1990s. The crisis was mainly caused by land clearing for agricultural uses via open burning on the Indonesian island of Sumatra. Satellite images confirmed the presence of hot spots throughout Kalimantan/Borneo, Sumatra, the Malay Peninsula and several other places, with an estimated 45,000 square kilometres of forest and land burnt. Malaysia, Singapore and, to a certain extent, Thailand and Brunei were particularly badly affected. The haze is nearly an annual occurrence in some ASEAN nations. Dangerous levels of haze usually coincide with the dry season from June to September when the southwest monsoon is in progress. Southwest monsoon winds shift the haze from Sumatra, Indonesia towards the Malay Peninsula and Singapore, sometimes creating a thick haze that can last for weeks. Negotiation history The agreement was established in 2002, though has some foundation in a 1990 agreement made among ASEAN Ministers of Environment which called for efforts leading to the harmonization of transboundary pollution prevention and abatement practices. The treaty also builds on the 1995 ASEAN Cooperation Plan on Transboundary Pollution and the 1997 Regional Haze Action Plan. This treaty is an attempt to bring the action plan into function. Parties to the agreement Institutional structure The agreement is managed by the Ministers of Environment and other representatives from the respective ASEAN countries. Meetings are coordinated under the ASEAN Socio-Cultural Community Council (ASCC), one of three councils, subsidiary to the ASEAN summit and its chair. Activities The treaty calls for haze to be mitigated through concerted national efforts and intensified regional and international co-operation in the context of sustainable development. This is to be done through monitoring and prevention activities. Protocols The official procedure or system of rules that informs this agreement is the 'ASEAN Way' set of region norms and codes of diplomatic conduct characterised by principles of non-interference, consultation, consensus, quiet diplomacy, symbolism, and organizational minimalism. Achievements In October 2013