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