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 | B | R | C |
| L | D | T | H | G | I | L | H | A |
| E | S | N | I | A | M | E | R | P |
| U | M | Y | F | J | M | P | H | R |
| F | O | S | S | I | L | S | E | O |
| I | K | I | C | O | A | L | A | C |
| R | E | A | L | J | W | C | T | K |
| E | L | G | N | I | N | R | U | B |
| H | P | P | E | T | R | O | L | Y |
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