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 | B | X |
| O | H | E | N | E | R | G | Y | M |
| A | R | E | M | A | I | N | S | B |
| L | A | A | M | F | I | Z | M | U |
| F | O | S | S | I | L | S | O | R |
| T | A | E | H | R | C | D | K | N |
| L | O | R | T | E | P | A | E | I |
| E | O | I | T | H | G | I | L | N |
| C | F | W | L | L | E | U | F | G |
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