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