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