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BIOFUEL
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COAL
ISOTOPES
MAGMA
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MINERAL
NATURAL
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RESOURCES
| G | E | C | R | U | O | S | E | R |
| A | N | M | N | M | D | I | E | E |
| B | W | A | A | L | B | S | M | M |
| I | O | G | T | E | O | O | I | O |
| O | D | M | U | U | C | T | N | V |
| M | T | A | R | F | O | O | E | A |
| A | L | C | A | O | A | P | R | L |
| S | E | B | L | I | L | E | A | Y |
| S | M | W | Y | B | X | S | L | R |
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