Make fuel
(gas) out
of plants
(Biofuels)
G
G
G
B
N
O
I
B
O
G
N
N
I
O
I
N
I
B
B
B
O
G
I
O
Size:
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Start
G
History
Start
G
G
G
B
N
O
I
B
O
G
N
N
I
O
I
N
I
B
B
B
O
G
I
O
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