Portland Oregon–Sustainable City usa (2012) Portland. Green Portland. Retrieved April 10,

2012, From http://www.Myportlandoregonhome.Com/green-portland/

Quirke, K. (2000, August 28). Global warming and Increasing catastrophe losses. Retrieved

April 5, 2012, from Ebscohost database.

Rosegrant, W. M., Zhu, T., Msangi, S., & Sulser, T. (2008, December 15). Global scenarios

Daniyar Global warming 30

for biofuels: Impacts and implications. Retrieved March 7, 2012, from Ebscohost database.

Spencer, W. R. (2007, August 3). How serious is the global warming threat? Retrieved

February 25, 2012, from Ebscohost database.

Tipton, E. J. (2008, September 11). Why did Russia ratify the Kyoto protocol? Why the wait?

An analysis of the environmental, economic, and political debates. Retrieved March 8, 2012, from Ebscohost database.

Trembly, A. C. (2009, March2). Is Global Warming Just Our Catastrophe Du Jour, Retrieved

April 5, 2012, from Ebscohost database.