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BIOFUEL
BIOMASS
COAL
ISOTOPES
KEROGEN
MAGMA
MELTDOWN
MINERAL
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| S | K | D | X | B | C | S | R | W |
| N | E | R | E | I | S | E | N | L |
| A | R | C | A | O | S | P | W | L |
| T | O | A | R | F | A | O | O | A |
| U | G | M | L | U | M | T | D | V |
| R | E | G | A | E | O | O | T | O |
| A | N | A | O | L | I | S | L | M |
| L | M | M | C | J | B | I | E | E |
| I | L | A | R | E | N | I | M | R |
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