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AP Enviro



Unit 9

9.0 Unit 9 Overview: Global Change

2 min readmay 29, 2020

Jenni MacLean

Contextualizing the Unit

Image Courtesy of Pixabay

This unit is a culminating look at how the actions of humans can have global impacts. By understanding how our actions can alter environments and the consequences that have on species we can begin to develop a plan for change. We will explore cases of countries coming together and having great success in preserving Earth's natural resources, as well as times when humans have caused irreparable harm. Some of the topics include global climate change, altering the ocean’s temperature and pH and loss of biodiversity. Overall this unit provides a look into the vast impact humans can have as well as offering avenues for hope and change. 

Laws and Treaties

1973 - The Endangered Species Act:
United States Regulation created to provide for the conservation of endangered and threatened species. Designed to preserve habitats to protect organisms from extinction. 
1987 - The Montreal protocol:
An international agreement designed to phase out the production of chemicals responsible for the depletion of the ozone.
1992 - The Kyoto Protocol:
 An international agreement to reduce greenhouse gasses. 
1996 - National Invasive Species Act (NISA):
A United States federal law intended to prevent invasive species from entering inland waters through ballast water carried by ships. 
2016 - The Paris Agreement:
An international agreement within the United Nations Framework Convention on Climate Change (UNFCCC), dealing with greenhouse-gas-emissions mitigation. November 2019, as soon as it was legally possible, the U.S. submitted a formal notice of withdrawal.


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