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