- ATo regulate the price of refrigerants
- To phase out ozone-depleting substances
- CTo establish HVAC technician licensing
- DTo set efficiency standards for air conditioners
Correct answer
To phase out ozone-depleting substances
Why
The Montreal Protocol is an international treaty designed to protect the ozone layer by phasing out the production and consumption of ozone-depleting substances.
The concept behind this question
The Montreal Protocol is the international treaty that set the phase-out schedule for ozone-depleting substances; Section 608 of the U.S. Clean Air Act is the domestic regulation that implements it for refrigerants. Section 608 is why technician certification exists at all: it makes it unlawful to knowingly vent regulated refrigerants during the maintenance, service, repair or disposal of appliances, and it requires that anyone doing that work be certified.
More questions on this topic
Exam-style practice question. Not an official EPA exam question.