Registered Environmental Manager (REM) Practice Exam

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What do projections suggest about the future of the ozone hole?

It will grow larger in size
It will not change significantly
It is expected to return to 1980 levels between 2050 and 2070
It will disappear entirely

The correct answer is: It is expected to return to 1980 levels between 2050 and 2070

The statement that the ozone hole is expected to return to 1980 levels between 2050 and 2070 is supported by scientific research and predictions related to the recovery of the ozone layer. This projection is primarily based on the successful implementation of the Montreal Protocol, which led to the phasing out of substances responsible for ozone depletion, such as chlorofluorocarbons (CFCs). As a result of these global efforts to reduce ozone-depleting substances, atmospheric concentrations of these chemicals are expected to decrease, allowing the ozone layer to recover. Studies utilizing atmospheric models have shown that by the middle of the 21st century, levels of ozone in the stratosphere are projected to rise to pre-1980 levels, thereby reducing the size and intensity of the ozone hole over Antarctica. The successful recovery emphasizes the importance of international cooperation in environmental governance and the benefits of adhering to regulations designed to protect the atmosphere.