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