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perl/lib/Graph-Easy-0.76/t/fun/biofuel.txt

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+# Example from: http://www.islandseeds.org/wiki/Biofuel
+# http://www.islandseeds.org/wiki/Biofuel
+
+graph { flow: east; }
+node { shape: ellipse; }
+
+   [ solar energy ] { fill: yellow; }
+   [ water] { fill: cyan; }
+   [ soil ] { fill: burlywood; }
+
+-> [ vegetation ]
+-> [ processing ]
+-> [ biofuel ]
+-> [ combustion ]
+-> [ useful work ] { fill: lightgray; }
+
+[ combustion ] -> [ carbon dioxide ]
+[ combustion ] -> [ pollution ]
+
+[ processing ] ..> [ compost ] ..> [ soil ]
+[ processing ] ..> [ carbon dioxide ]
+[ processing ] ..> [ pollution ]
+
+[ water ] -> [ vegetation ]
+[ solar energy ] -> [ vegetation ]
+
+