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