Is burning candles dangerous if left unattended?
Is burning candles dangerous if left unattended?
user
The flame can cause harm in two ways: by starting fires that spread out of control, and by fumes that build up.  The flame could also spread the poisonous gas (carbon monoxide) around, so you shouldn’t put your face near to the flame.
assistant
What did people do before modern electrical lights?
user
There are many old-style lamps with oil or wax as their fuel.  They use a wick to transfer oil or wax from a reservoir to the light bulb.  The wick is a long strip of fabric with no right angles to allow the liquid to flow and the flames to burn.
assistant
Sounds really dangerous.
user