Heating fuel option (3)
I believe the answer is:
gas
(Other definitions for gas that I've seen before include "Oxygen is one" , "What's needed to drive" , "Eg, hydrogen" , "chew the fat" , "Petrol (USA)" .)
I believe the answer is:
gas
(Other definitions for gas that I've seen before include "Oxygen is one" , "What's needed to drive" , "Eg, hydrogen" , "chew the fat" , "Petrol (USA)" .)