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