1. Intergovernmental Panel on Climate Change. Climate change 2013: the physical science basis. Fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press; 2013.
2. Year in review-EROI or energy return on (energy) invested
3. National Energy Board. Canada’s energy future: energy supply and demand projections to 2035 – electricity outlook highlights. [Accessed June, 2012].
4. US Energy Information Administration. Annual energy outlook 2014. US DOE/EIA- 0383(2014). April 2014.
5. BP Energy. BP statistical review of world energy June 2014 (2014). .