Fossil fuels
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BURNING
CAPROCK
CHEMICAL
COAL
ENERGY
FIRE
FOSSILS
FUEL
HEAT
HEAT
LIGHT
OIL
PETROL
REMAINS
SMOKE
Q | G | N | I | N | R | U | B | J |
Y | L | O | R | T | E | P | L | L |
G | I | P | V | Z | L | A | E | E |
R | G | L | A | O | C | I | K | U |
E | H | S | L | I | S | S | O | F |
N | T | B | M | D | O | G | M | I |
E | R | E | M | A | I | N | S | R |
D | H | E | A | T | V | E | Y | E |
C | A | P | R | O | C | K | B | P |
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