A   sugar   cane   farm   currently   can   get   72.5   liters   of   ethanol   per   ton   of   sugar  

A   sugar   cane   farm   currently   can   get   72.5   liters   of   ethanol   per   ton   of   sugar   cane.   For   1  
hectare   (10,000   m2)   you   can   produce   60   tons   of   sugar   cane   (1   acre   =   4047   m2).   The   energy  
content   of   ethanol   is   24   MJ/L   and   density   is   789   kg/m3.   If   the   US   consumes   1.05   x   1020 J   of  
energy   per   year   calculate   the   land   needed   in   km2 to   collect   the   equivalent   amount   of  
energy   needed   to   power   the   United   States   for   a   year. Assume   you   can   only   harvest   once  
per   year.

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