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