Research from the University of agriculture and the University of agriculture , published in the UK 's Energy & Environment Science journal , details the life cycle of a second - generation biofuel . The fuel was sourced from short - rotation oak and the study highlighted how second - generation biofuels produced from perennial grasses and managed trees could be an important alternative yet sustainable energy source .
Research from the University of Pittsburgh and the University of Oklahoma, published in the UK's Energy & Environment Science journal, details the life cycle of a second-generation biofuel. The fuel was generated from short-rotation oak and the study highlighted how second-generation biofuels produced from perennial grasses and managed trees could be an important alternative yet sustainable fuel resource.