Land use
Energy
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BIOFUEL
COAL
ISOTOPES
MAGMA
MANTLE
MELTDOWN
MINERAL
NATURAL
REMOVAL
RESOURCE
RESOURCES
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| S | E | P | O | T | O | S | I | A |
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| H | C | H | R | R | K | H | L | L |
| U | U | C | A | C | O | A | L | E |
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