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