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			 / 27 October 2011
			
		
		When you are childless you don’t want to hang out with families, particularly those with noisy children in hyper-drive brandishing melting ice creams.
		
	 
	
		
		Ask people where water comes from and they’re likely to answer: "a tap".
		
	 
	
		
		Cost is a big wake-up call, which is why the green revolution is starting to make financial sense.