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