In Amami-Oshima there are many forest resources and vegetation cover was mostly laurel trees like Castanopsis sieboldii. We investigated traditional wooden folk houses in Amami-Oshima. This report is mainly presented the wooden construction system called "Hikimun". We researched seven traditional wooden folk houses at Sumiyou villages and Yamato villages there are the mountain area and at Kasari villages there are the plain area in Amami-Oshima. Castanopsis sieboldii was used as many parts except the main construction. As inter pillars and Hikimun, Schima wallichii were used. And about after 1945, Castanopsis sieboldii was used as a roofing called Hiraki.
Biorefinery technology development in Indonesia especially related to production of biofuel from Crude Palm Oil (CPO) and other biomass from oil palm has already been progressing quite significantly during the last ten years. In 2018, Indonesia has implemented B-20 policy where 20% of diesel is blended with biodiesel from CPO. Likewise, researches on development of enzymes for various application including its application in the production of biofuel from CPO and Oil Palm Empty Fruit Bunches (OP EFB) through an enzymatic process has also been progressing. However, there is not enough research or information on what are the economic and environmental impact of this biofuel production to local community. Does this biofuel production also provide direct and indirect benefit to local community surrounding oil palm plantation and CPO mills? If it does, How? This paper describes what are specific economic and environmental issues facing by local community and how a biofuel production in the surrounding of local community can get environmental and economic and benefits. This case study was conducted in 2018 at 6 villages in Putri Hijau District, North Bengkulu Regency, Bengkulu Province, Indonesia
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