Biomass is defined as the biodegradable fraction of products, wastes and residues of biological origin from agriculture (including plant and animal matter), forestry and related industries, fisheries and aquaculture, as well as the biodegradable fraction of industrial waste and domestic of waste. Biomass is used for heating greenhouses, heating buildings with biomass burning in individual/central boilers, energy production in agricultural and wood industries, district heating and energy production in biological treatment plants and Sanitary Landfills. Also, biomass can be converted into transportation biofuels, such as bioethanol and bio-oil.

The use of biomass is considered more environmentally friendly than traditional energy production methods based on fossil fuels, as during its life cycle it has already absorbed approximately the same or even more CO2 than that released by energy utilization of . After all, the Greek state, with the Regulation on the Energy Performance of Buildings (KENAK), defines zero emitted pollutants for Biomass per unit of energy (0KgCO2/KWh).

By utilizing biomass, significant benefits can be obtained as it contributes to:

• In environmental protection
• In the development of the economy through new investments
• In the reconstruction of the development model of the agricultural sector
• In reducing energy costs in industry – improving competitiveness
• In strengthening the economic activity of small and medium enterprises
• In creating new jobs and retaining the population in the region.
• In saving conventional fuel, with a corresponding saving in foreign exchange.
• To reduce the country's dependence on foreign energy sources.