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