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