Biomass is a fuel which is derived from organic materials and is a sustainable and renewable source of energy used to generate electricity or different forms of power. Biomass is mostly found in the form of living or recently living plants and biological wastes from industrial and home use while there are other forms too. Biomass can be converted to different effective forms of energy like methane gas or transportation fuels like ethanol and biodiesel.

Bioenergy is conversion of biomass resources including agricultural and forest area residues, organic municipal waste and from vegetation to useful energy carriers inclusive of heat, power, electricity generation and transport fuels. Biomass uses is increasing day by day for modern applications such as Dendro-power, Co-generation and Combined Heat and Power generation (CHP). Relying on the useful resource availability and technical, economic and environmental impact, these can be the alternatives to fossil fuels applications

Biofuels include cellulosic ethanol, biodiesel, and renewable hydrocarbon "drop-in" fuels. The two most commonly used biofuels today are ethanol and biodiesel. First generation biofuels are processed from the sugars and vegetable oils found in arable crops advanced biofuels are made from lignocellulosic biomass or woody crops, agricultural residues or waste, which makes it tougher to extract the vital fuel. Advanced biofuel technologies have been invented because first generation biofuels manufacture has major boundaries and limitations.

Bioenergy is renewable energy made accessible and available from material obtained from organic sources. Biomass is any organic material which stores sunlight in the form of chemical energy. In its most thin sense, In its wider sense, it incorporates biomass, the organic material utilized as a biofuel and in addition This is a typical misbelief, as bioenergy is the energy separated from the biomass, as the biomass is the fuel and the bioenergy is the vitality contained in the fuel.

Renewable Energy is generally defined as any energy resources that can be naturally renew or regenerated over a short period of time and which is directly derived from the sun  from other mechanisms of natural resources REN21 is an energy policy network that brings government and non-governmental organisation together and other organisations to learn from one another and build successes in advance renewable energy. Renewable energy which is replaced by a natural process as the rate of process is faster than the rate which is consumed. Renewable energy is energy that is obtained from natural processes and are continuously replenished.