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