B7 Ecosystems

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Closed loop systems 

-All outputs are recycled within a perfect closed loop system they are used as inputs into other processes in the system 

-There are NO outputs from a perfect closed loop system (NO WASTE) and there are no inputs 

-However most systems arent perfect closed loops they have inputs and outpts too 


-Ecosystems are a type of closed loop system due to most of the waste (output) produced by organisms isnt lost- its recycled as food or reactants for other organisms eg humans breath out CO2 as waste which is recycled by trees. 

-Oxygen is a waste product produced by plants during photosynthesis and is recycled by organisms in repiration 

Stable Ecosystems have balanced inputs and outputs 



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