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