Gas geysers: Serial killers causing death due to carbon monoxide poisoning.

Carbon monoxide is a dangerous lethal gas that evolves during practically every type of combustion, and is also emitted by automobiles. In recent times, gas geysers which have emerged as a cost-effective, efficient method of heating water are increasingly being implicated in accidental deaths in unventilated or ill-ventilated bathrooms, due to carbon monoxide accumulation. This paper reviews four such accidental deaths which have taken place in Bangalore.