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Chapter 19: Problem 18

Describe the international efforts that are currently in place to protect our ozone shield. What evidence is there that such efforts have been effective?

Short Answer

Expert verified
Major global efforts to protect our ozone shield include the Montreal Protocol, which has led to a significant decrease in the use of ozone-depleting substances. The effectiveness of these measures is substantiated by scientific findings revealing that the ozone layer is recovering and might be fully regenerated by mid-century.

Step by step solution

01

Identify International Efforts

Various international treaties and agreements have been made to protect the ozone layer. The most notable among these include the Montreal Protocol of 1987, which has resulted in the phase-out of many ozone-depleting chemicals across the globe.
02

Explanation of the Efforts

Understand each specified effort. For instance, the Montreal Protocol on Substances that Deplete the Ozone Layer is a global agreement to protect the earth's ozone layer by phasing out the production of numerous substances believed to be responsible for ozone depletion. Updated and adjusted over the years, it has seen worldwide reduction in the consumption of ozone-depleting substances and has continued to mandate replacement with ozone-friendly alternatives.
03

Identify Evidence of Effectiveness

To analyze the impact of these efforts, scientific findings are to be referenced. Recent reports by the United Nations Environment Programme and the World Meteorological Organization assert that the ozone layer is healing and may fully recover by mid-century. The recovery is attributed to the global reduction in the usage of ozone-depleting substances, which is a success of the Montreal Protocol.
04

Correlate Efforts with Evidence

The final stage of the task is to relate the identified efforts to the evidence of their results. For example, the improved status of the ozone layer, pointed out in many scientific studies is a direct result of the implementation of agreements like the Montreal Protocol.

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