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