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