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Ozone Depletion and Regulations Flashcards

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  1. Which class of refrigerants has the highest ozone depletion potential and was scheduled for earliest phaseout?

    Answer: CFCs

    CFCs have the highest ODP and were phased out first.

  2. HCFCs like R-22 were designed as interim replacements because they have what property?

    Answer: Lower ozone depletion potential than CFCs

    HCFCs break down more easily, giving them a lower ODP than CFCs.

  3. As of regulations, the production and import of HCFC-22 (R-22) for new equipment was banned beginning in which year?

    Answer: 2010

    Production of R-22 for new equipment was banned starting January 1, 2010.

  4. Which refrigerant type has zero ozone depletion potential but can still have a high global warming potential?

    Answer: HFCs

    HFCs contain no chlorine so have zero ODP, but many have high GWP.

  5. Why are CFCs so destructive to the ozone layer compared to natural compounds?

    Answer: They are chemically stable and rise intact to the stratosphere

    Their stability lets them reach the stratosphere where UV breaks them down to release chlorine.

  6. The phasedown of HFCs, which protects the climate rather than ozone, was added through which amendment to the Montreal Protocol?

    Answer: Kigali Amendment

    The Kigali Amendment added a global HFC phasedown to address climate impact.

  7. Which U.S. law authorized the HFC phasedown in alignment with the Kigali Amendment?

    Answer: The AIM Act

    The American Innovation and Manufacturing (AIM) Act authorizes the U.S. HFC phasedown.