Find and circle the thirty natural gas related words. The words may be vertical, horizontal, diagonal, or backwards.

BARBECUES CALL CARS CAULKING COOKING DRILL DRYING ENERGY ENVIRONMENT FIREPLACES FOSSIL FUEL FURNACE GAS HEATING

HYDROCARBON INSULATION MERCAPTAN METER METHANE NATURAL NONRENEWABLE ODOUR OZONE PETROLEUM PIPELINE RESERVOIR SAFETY SEDIMENTARY THERMOSTAT