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