This video segment adapted from Interactive NOVA profiles two scientists who were surprised in 1984 to discover a hole in our atmosphere's ozone layer as big as the United States. [3:47]

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Concepts

chlorofluorocarbons

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Additional Tags

atmospheric gas, chlorofluorocarbon molecule, hole in the sky, miracle compound, ozone hole, cfc, pbs learningmedia: a hole in the sky, teachers' domain, wgbh, ozone layer

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Classroom Considerations

Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)

View 8,327 other resources for 9th - 10th Grade Earth Science