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