Final answer:
If an air conditioning system works but does not meet modern standards, it is called outdated or non-compliant. Upgrading to a more environmentally friendly refrigerant would help meet modern standards for air conditioning systems.
Step-by-step explanation:
If an air conditioning system works but does not meet modern standards, it is called outdated or non-compliant. Air conditioning systems that do not meet modern standards may be inefficient, use outdated technology, or have lower performance compared to newer systems. For example, if an air conditioner uses a refrigerant that contributes to damage to the Earth's ozone layer, it would be considered non-compliant with modern standards. Upgrading to a more environmentally friendly refrigerant would help meet modern standards for air conditioning systems.