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Abstract: Biofuel is recognised as an important renewable and sustainable energy source to substitute fossil fuel. To date, biofuel has been evolved from first to fourth generation and they are mainly differed in feedstock and production technologies. Along with the evolution, various studies on different sustainability criteria have been conducted. In this review paper, the state of the art of technologies and assessment methods on economic performance, safety, health and environment (SHE) as well as social impact for biofuel production are reviewed. In addition, this review paper also evaluates the typical methodological framework used for systematic assessment during early process design phase. As conclusion, to establish the highest sustainability in biofuel production, continuous research and development on all sustainability-related aspects are very much needed. [Copyright &y& Elsevier]

Abstract: Alongside with biofuel development, social acceptance issues have been underestimated. While social acceptance can emerge as powerful barrier for biofuel development, this article provides discussion on social acceptance in biofuel context. An acceptance framework based on life cycle biofuel production had been referred for a better understanding on social acceptance issues. Malaysia has been referred for the discussion as the country has faced with acceptance issue in their biofuel program. The discussion point out different societal groups will demand specific consideration for either support or oppose biofuel. This paper concludes that biofuel development will be constraint if social acceptance issues remain neglect. [Copyright &y& Elsevier]