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