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