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