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