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