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