Adat law and culture: The local authority elements of Baduy tribe on environment preservation

Indonesia is a country that has cultural diversity and Adat law, one of which is the culture of the Baduy tribe. However, social and economic changes that impact the environment led researchers to identify how the Baduy tribe maintains an environment based on cultural and adat laws. This paper used observation and interview methods to identify the environmental preservation that the Baduy tribe has been doing. Baduy Luar has used modern goods, but Baduy Dalam still does not use it. Both do not cut down trees in protected forest areas and still rely on the river to meet their daily water needs, from farming, drinking, or only bathing and cleaning the furniture. They believe and trust "ancestral rules". That beliefs make them trust to Pu'un as someone with authority, which always preserves that ancestral rules. Pu'un can decide on preserved their ancestral rule. These are fundamental aspects as the laws here represent how the culture tries to reserve the environment. That is much needed as the laws will not do it anymore to prevent environmental damage by society. However, this paper results can be used to build the culture and law for preserved the environment in national society with further study.