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