1. WRI, 2015, Climate data explorer, World Resources Institute (WRI), Washington, D.C., http://tinyurl.com/onaeabz, Accessed: 2015.05.22.
2. IEA, Key world energy statistics, International Energy Agency (IEA), Paris, 2014.
3. EIA, 2015, International Energy Statistics, Energy Information Administration (EIA), Washington, D.C., http://tinyurl.com/nrbkjkm, Accessed: 2015.05.22.
4. JRC, 2015, GHG emission time series 1990-2012, Joint Research Centre (JRC), http://edgar.jrc.ec.europa.eu/overview.php?v=GHGts1990-2012, Accessed: 2015.05.22.
5. The White House, US-China Joint Announcement on Climate Change and Clean Energy Cooperation, The White House, Office of the Press Secretary, 2014.