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