1. International Energy Agency, World Energy Outlook (Paris: OECD/IEA, 2012).
2. Boden, T., Marland, G. & Andres, R. Global, Regional and National Fossil-Fuel CO2 Emissions (Oak Ridge National Laboratory, US Department of Energy, 2015).
3. Intergovernmental Panel on Climate Change, Climate Change 2014: Synthesis Report (
http://ipcc.ch
; trillionthtonne.org, 2014).
4. International Energy Agency, Energy Technology Perspectives (Paris: OECD/IEA, 2012).
5. Grant, D., Jorgenson, A. & Longhofer, W. Targeting electricity’s extreme polluters to reduce energy-related CO2 emissions. J. Environ. Stud. Sci. 3, 376–380 (2013).