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