6.+References


 * __6. References __**

BrainPOP (1999-2010). Science. BrainPOP.com Videos retrieved 6 Dec 2010 from []  FEMA (n.d) Federal Emergency Management Agency. FEMA.gov. Information retrived on 6 Dec. 2010 [] [Drought image] US Army Corps of Engineers (2010). Image retrieve 6 Dec. 2010 from @http://www.sas.usace.army.mil/50/Images/drought.jpg

[Flood image]. National Geographic Society (1996-2010 ). Image retrieved 6 Dec. 2010 from [|http://environment.nationalgeographic.com/environment/natural-disasters/floods-profile?q=Drought] [Tornado image].National Geographic Society (1996-2010 ). Image retrieved 6 Dec. 2010 from @http://environment.nationalgeographic.com/environment/natural-disasters/tornado-profile/?source=A-to-Z