escape/exit doors

Date:         01 Nov 97 18:55:54 
From: (Gp810)
Organization: AOL
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Why are the emergency exit doors of airliners located amid ship?
Since the main cabin entry/exit door is front left, why can't the emergency
 doors be staggered along the plane?  First could be at row 10-right, then row
 15 left;
row 20-right; 25 left, etc.
Would this not provide for a more orderly and safe exit.
In addition to each door having to accommodate few passengers, they would
 provide differeing positions whereever the problem (fire) was.