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