Which statement correctly describes the relationship between ODP and ozone depletion?

Which statement correctly describes the relationship between ODP and ozone depletion?

• A. ODP measures the amount of ozone created
• B. ODP is unrelated to ozone
• C. ODP measures ozone depletion potential
• D. ODP measures the rate of ozone formation

Answer: (C)

ODP is about how much a substance would contribute to destroying the ozone layer, not how much ozone is created or how fast ozone forms. It’s a comparative, dimensionless metric called ozone depletion potential, usually set relative to a reference substance (CFC-11) with an ODP of 1.0. The value reflects the chemical reactivity of the substance in the stratosphere and its lifetime, telling us how potent it is at causing ozone loss over a standard time horizon. That’s why the statement describing ODP as measuring ozone depletion potential is the correct one. It’s not about creation, it’s not a neutral, unrelated quantity, and it doesn’t indicate the rate of ozone formation.

ODP is about how much a substance would contribute to destroying the ozone layer, not how much ozone is created or how fast ozone forms. It’s a comparative, dimensionless metric called ozone depletion potential, usually set relative to a reference substance (CFC-11) with an ODP of 1.0. The value reflects the chemical reactivity of the substance in the stratosphere and its lifetime, telling us how potent it is at causing ozone loss over a standard time horizon. That’s why the statement describing ODP as measuring ozone depletion potential is the correct one. It’s not about creation, it’s not a neutral, unrelated quantity, and it doesn’t indicate the rate of ozone formation.