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