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				 El Nino - a warming of sea temperatures in the 
				Pacific - affects wind patterns and can trigger both floods and 
				drought in different parts of the globe, curbing food supply. 
				 
				The bureau said sub-surface sea temperatures had warmed by as 
				much as 6 degrees in recent months. Higher sea temperatures 
				prompted an Australian climate scientist on Monday to warn that 
				the weather event, which can cause both floods and drought in 
				different parts of the globe, could be one of the strongest in 
				nearly two decades. 
				 
				(Reporting by Colin Packham; Editing by Ed Davies) 
				
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