The conversation between human and AI assistant.
Why is there a blue flame in burning LPG gas and a yellow flame on burning wood?
Oh, I see. Does that mean the blue flame is more efficient than the yellow flame?
Yes, that's correct. The blue flame is a sign of complete combustion, which means that all the fuel is being used efficiently with no waste. The yellow flame, on the other hand, is a sign of incomplete combustion, which means that some of the fuel is being wasted without being used efficiently.