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