Final answer:
The refrigerant in an appliance, such as a refrigerator, must be removed before disposing of the appliance to prevent environmental pollution.
Step-by-step explanation:
Before disposing of an appliance, such as a refrigerator, it is necessary to remove the refrigerant from it. Refrigerants are substances used in cooling systems to absorb and release heat.
They are typically gases or liquids that can be harmful to the environment if released into the atmosphere. The refrigerant must be properly recovered and recycled or disposed of according to local regulations to prevent environmental pollution.