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