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