Land use
Energy
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BIOFUEL
COAL
ISOTOPES
MAGMA
MANTLE
MELTDOWN
MINERAL
NATURAL
REMOVAL
RESOURCE
RESOURCES
| Y | X | S | M | B | R | C | H | S |
| E | N | E | A | I | F | Q | E | F |
| C | W | P | G | O | B | C | L | R |
| R | O | O | M | F | R | A | A | E |
| U | D | T | A | U | R | K | R | M |
| O | T | O | O | E | T | Q | U | O |
| S | L | S | N | L | S | T | T | V |
| E | E | I | C | O | A | L | A | A |
| R | M | A | N | T | L | E | N | L |
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