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