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