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