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