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CLEAN, PBS Global Weirding


6th, 7th, 8th, 9th, 10th


Science, Earth and Space Sciences

Regional Focus


What About the Ozone Hole?

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  • This video explains the connection between global warming and the ozone hole, chemical build-up in our lower and upper atmospheres, increased GWP gases, increased air quality ozone alerts, and the 1987 Montreal Protocol that banned the use of CFCs globally.
  • Students will learn about the history of the ozone hole and the efforts to help protect the ozone layer.
Teaching Tips


  • The video includes helpful animations to keep students engaged and ends on a positive note.
  • The narrator presents information clearly and with a conversational tone.

Additional Prerequisites

  • The video mentions Earth's poles, so teachers may wish to have a globe in the classroom to use as a resource. 
  • Teachers can share this information via social media or embed the video as a link within a lesson plan.
  • Because the vocabulary is somewhat rigorous, a definition list will be helpful. 
  • It may benefit students to know about greenhouse gases, the greenhouse effect, and chemical notation.


  • Science teachers can pause the video and have students take notes about the history of CFCs, their effect on the ozone layer, and the different layers of the atmosphere.
  • The UN is mentioned, along with the terms "Montreal Protocol," "ratification," and "treaties," so Social Studies teachers can utilize the lesson when discussing the need for the United Nations.
  • Students can discuss the influence of carbon emissions on global warming and the poles' recovery and can research solutions for reducing emissions.
  • Some students may benefit from guided notes and slowing the video playback speed.
Scientist Notes

This resource is from the CLEAN collection. “The CLEAN collection is hand-picked and rigorously reviewed for scientific accuracy and classroom effectiveness.”


This resource addresses the listed standards. To fully meet standards, search for more related resources.

  • English Language Arts
    • Speaking & Listening (K-12)
      • SL.6.2 Interpret information presented in diverse media and formats (e.g., visually, quantitatively, orally) and explain how it contributes to a topic, text, or issue under study.
      • SL.7.3 Delineate a speaker's argument and specific claims, evaluating the soundness of the reasoning and the relevance and sufficiency of the evidence.
  • Science
    • ESS2: Earth's Systems
      • MS-ESS2-2. Construct an explanation based on evidence for how geoscience processes have changed Earth’s surface at varying time and spatial scales.
      • HS-ESS2-2. Analyze geoscience data to make the claim that one change to Earth’s surface can create feedbacks that cause changes to other Earth systems.
    • ESS3: Earth and Human Activity
      • MS-ESS3-3. Apply scientific principles to design a method for monitoring and minimizing a human impact on the environment.
      • MS-ESS3-5. Ask questions to clarify evidence of the factors that have caused the rise in global temperatures over the past century.
    • ETS1: Engineering Design
      • HS-ETS1-3. Evaluate a solution to a complex real-world problem based on prioritized criteria and trade-offs that account for a range of constraints, including cost, safety, reliability, and aesthetics, as well as possible social, cultural, and environmental impacts.
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