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