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 |
| V | N | W | O | D | T | L | E | M |
| S | E | P | O | T | O | S | I | L |
| D | C | O | A | L | O | N | A | A |
| B | I | O | F | U | E | L | M | R |
| H | L | Y | R | R | D | P | G | U |
| U | N | C | A | B | I | C | A | T |
| N | E | L | T | N | A | M | M | A |
| S | R | E | M | O | V | A | L | N |
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