The making of a sandwich

The making of a sandwich

1. bread

   • let the cereal grow
   • drill the seeds into the field
   • harrow the field
   • plough the field
   • plant the cereal
     • protect the crop
       • a lot of chemicals
         • fungicide
         • herbicide
         • insecticide
         • oil use
     • nutrients
       • chemical fertilizer
         • natural gas use
     • ripened
       • harvested
         • dry grain
           • heated
           • processed
         • diesel use

2. ham

   • pigs grow on grain
     • 1/2 ton

3. salad

   • heated greenhouse
   • refrigerated lorry
   • transported

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