The issues of GHG emission mitigation and sustainable development have been one of the foremost concerns of the international community since Kyoto Protocol was established in December 1997. Bio mass, which can play a dual role in GHG mitigation related to the objectives of the UNFCCC, i.e. as an energy source to substitute for fossil fuels and as a carbon store, is believed to be one of the most promising alternatives for fossil fuels. A sustainable bioenergy system involves technological, envi