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