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