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