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9.4 Increases in the Greenhouse Gases

Part of Global Change in AP® Environmental Science. Read the opening section, then create a free account for the full interactive lesson, practice, and progress tracking.

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Human activity has caused atmospheric concentrations of greenhouse gases to rise far above pre-industrial levels. CO₂ alone has risen from ~280 ppm in 1750 to over 420 ppm today.

In this unit

10 lessons

  1. 9.1Stratospheric Ozone DepletionPreview lesson
  2. 9.2Reducing Ozone DepletionPreview lesson
  3. 9.3The Greenhouse EffectPreview lesson
  4. 9.4Increases in the Greenhouse GasesThis lesson
  5. 9.5Global Climate ChangePreview lesson
  6. 9.6Ocean WarmingPreview lesson
  7. 9.7Ocean AcidificationPreview lesson
  8. 9.8Invasive SpeciesPreview lesson
  9. 9.9Endangered SpeciesPreview lesson
  10. 9.10Human Impacts on BiodiversityPreview lesson

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