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