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