Sources:
- www.kids.esdb.bg/biomass.html
- www.biomass.net/Biomass-History.html
- www.ectgroup.org/content/86-worlds-biomass-located-global-south
- www.cleantechbiofuels.net/Biomass recovery process/index.html
- www.bioenergyconsult.com/tag/how-is-biomass-stored/
- www.iptv.org/exploremore/energy/profiles/biomass.cfm
- www.conserve-energy-future.com/Advantages_Disadvantages_Biomass Energy.php
- www.bioenergy.ornl.gov/reports/fuelwood/chap4.html
- www.ucsusa.org/clean_energy/our-energy-choices/renewable-energy/enviromental-impacts-biomass-for-electricity.html#.VLh2
- www.ieabioenergytask43.org/wp-content/uploads/2013/09/IEA_Bioenergy_Task43_TR2013-01i.pdf