Fossil
Fuels
G
G
N
N
I
B
B
O
B
N
G
O
G
I
O
O
B
I
B
G
I
O
N
I
Size:
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Start
G
History
Start
G
G
N
N
I
B
B
O
B
N
G
O
G
I
O
O
B
I
B
G
I
O
N
I
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