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