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