1. Basu P (2013) Biomass gasification, pyrolysis, and torrefaction. In: Practical design and theory, 2nd edn, Academic Press, Amsterdam
2. Climate Change (2013) The physical science basis, intergovernmental panel on climate change
3. United Nations Department of Economic and Social Affairs (2004) World population to 2300. United Nations, Department of Economic and Social Affair, New York
4. EIA (2012) International energy statistics database. www.qeia.gov/ies
5. WBA (World Bioenergy Association) (2016) WBA global bioenergy statistics