1) International Energy Agency (IEA), World Energy Outlook 2007, http://www.iea.org/textbase/npsum/WEO2007SUM.pdf

2) United Nations Framework Convention on Climate Change, September 2009, Fact sheet: Copenhagen: why is a deal so important?, http://unfccc.int/files/press/application/pdf/fact_sheet_copenhagen_deal.pdf

3) A. Shah, Global Issues: US and Foreign Aid Assistance, Apr 2009, http://www.globalissues.org/article/35/us-and-foreign-aid-assistance#Almostallrichnationsfailthisobligation