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