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