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