1. The only reason why transit candles in Thailand can remove the smell of smoke is that amorphous carbon such as black carbon produced by candle burning can adsorb smoke. In fact, carbon black is also smoke, floating in the air, and people don't just inhale the smoke in the air.

2. Inhaling the black smoke from candles will only make the indoor air dirtier and inhale more smoke. Smoke with candles also has a strong smell.