What potential risk does a pacemaker pose during cremation?

The potential risk posed by a pacemaker during cremation is that it can explode and damage the retort. Pacemakers contain batteries and electronic components that can build up pressure when exposed to the high temperatures of cremation. If not removed prior to the cremation process, the pacemaker may rupture or even explode, which can cause significant damage to the retort, the chamber where cremations occur. This risk highlights the importance of proper preparation and adherence to safety protocols, ensuring that any medical devices are removed before the cremation takes place.

In contrast, while pacemakers do not create a pleasant aroma, melt to contribute to ashes, or remain harmless during cremation, these aspects underscore a lack of understanding of hazardous materials that require careful handling in the cremation process.