Lesson Plan: First Steps Toward Healing the Ozone
Grades 9-12
The ozone layer is a region of the Earth’s stratosphere that contains a relatively high concentration of the gas ozone (O3). This concentration allows the ozone layer to absorb most of the sun’s ultraviolet light, protecting Earth’s inhabitants from the harmful energy. In the 1970s, the threat to the ozone layer was one of the first environmental hazards that captured the attention of the general public. Scientists warned that action needed to be taken to repair the hole in the protective ozone layer to prevent millions of cases of skin cancer around the globe. Politicians, corporate leaders and scientists worked together to envision and ratify the Montreal Protocol. This collaborative effort has shown promise. This year, scientists announced that the ozone layer hole was beginning to heal. In this lesson, students will explore the scientific, political, economic and social events that led to the depletion of the ozone layer, as well as the global response.
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