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