AP Environmental Science Unit 9 - Global Change

2 min readoctober 14, 2021

AP Environmental Science ♻️

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AP Environmental Science Global Change Review

Here's an organized outline for AP Environmental Science Unit 9 reviews. This outline has been adapted from the 2019 Course Description published by College Board. You can use this to build an AP Enviro Unit 9 study guide.
Read: AP Environmental Science - Unit 9 Overview


Stratospheric ozone is vital to life on Earth, human activities have caused the depletion of stratospheric ozone. 
  • Chlorofluorocarbons (CFCs) deplete stratospheric ozone.
  • Stratospheric ozone absorbs harmful UV rays preventing them from reaching the Earth’s surface. 
  • Hydrofluorocarbons (HFCs) are more reactive than Chlorofluorocarbons (CFCs) and are not ozone-depleting chemicals, they are however still very strong greenhouse gases.

Effects on the World

Humans activities can increase greenhouse gases that can cause human health and environmental problems. 
Changing ecosystems and pressure from human populations can cause some species become endangered. 

Major Environmental Legislation

  • Clean Air Act
  • Clean Water Act
  • Comprehensive Environmental Response, Compensation, And Liability Act (CERCLA)
  • Convention On International Trade In Endangered Species Of Wild Fauna And Flora (CITES) 
  • Delaney Clause Of Food, Drug, And Cosmetic Act
  • Endangered Species Act
  • Kyoto Protocol
  • Montreal Protocol
  • Resource Conservation And Recovery Act (RCRA)
  • Safe Drinking Water Act (SWDA)

Unit 9 Vocab

  • Biodiversity
  • Chlorofluorocarbons (CFCs)
  • Endangered Species
  • Global climate change
  • Greenhouse effect
  • Greenhouse gases
  • Hydrofluorocarbons (HFCs)
  • Invasive species
  • Ocean acidification
  • Ocean warming
  • Stratospheric ozone

Browse Study Guides By Unit
🏜Unit 1 – The Living World: Ecosystems
🐠Unit 2 – The Living World: Biodiversity
👪Unit 3 – Populations
🌏Unit 4 – Earth Systems & Resources
🏖Unit 5 – Land & Water Use
⚡️Unit 6 – Energy Resources & Consumption
💨Unit 7 – Atmospheric Pollution
♻️Unit 8 – Aquatic & Terrestrial Pollution
🔥Unit 9 – Global Change
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