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BIOFUEL
BIOMASS
COAL
ISOTOPES
MAGMA
MANTLE
MELTDOWN
MINERAL
NATURAL
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RESOURCE
RESOURCES
| B | A | M | G | A | M | N | M | R |
| I | A | Z | R | A | A | I | E | E |
| O | O | K | N | T | N | S | L | M |
| F | T | T | U | E | O | O | T | O |
| U | L | R | R | U | F | T | D | V |
| E | A | A | R | B | E | O | O | A |
| L | L | C | O | A | L | P | W | L |
| Z | E | Z | Y | J | N | E | N | T |
| S | B | I | O | M | A | S | S | C |
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