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