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