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