Why is special handling and disposal necessary for some refrigerants?

Special handling and disposal are necessary for some refrigerants because they can contain harmful substances that pose risks to both health and the environment. Many refrigerants have been found to have toxic effects if released into the atmosphere or handled improperly. For example, certain refrigerants may contribute to ozone depletion or have high global warming potential, leading to environmental concerns. Additionally, mishandling of these substances can lead to exposure to harmful chemicals, which is detrimental to human health. Proper procedures must be followed to ensure that these refrigerants are managed safely and disposed of in a manner that minimizes risks to people and the environment.

Considering the other options, while specific pressure conditions can be a factor in refrigerant use, it is not the primary reason for special handling. The cost of the refrigerant does not influence its handling requirements, and effectiveness in cooling is generally not a priority compared to safety and environmental impact when discussing regulatory measures.