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