Final answer:
Refrigerants should never be discharged into the atmosphere because they can deplete the ozone layer and contribute to global warming, which is harmful to the environment.
Step-by-step explanation:
From an environmental point of view, refrigerant should never be discharged into the atmosphere. The answer to this statement is A) true. Refrigerants, which are substances used in cooling systems like air conditioners and refrigerators, often contain chemicals that can harm the environment. When released into the atmosphere, refrigerants have the potential to contribute to ozone layer depletion and to global warming due to their high global warming potential (GWP). The ozone layer is critical for protecting life on Earth from harmful ultraviolet radiation. Therefore, to prevent environmental harm, proper handling and disposal of refrigerants are vital, and discharging them into the atmosphere is not acceptable.