http://www.listofenvironmentalissues.com/environmental-issues-facts-for-kids/
https://www.epa.gov/
https://www.epa.gov/students/games-quizzes-and-videos-about-environment
https://www.ducksters.com/science/environment/
https://www.nationalgeographic.org/
https://www.worldwildlife.org/species/directory?direction=desc&sort=extinction_status
https://www.epa.gov/acidrain/what-acid-rain
https://www.nationalgeographic.org/encyclopedia/great-pacific-garbage-patch/
https://science.howstuffworks.com/environmental/green-science/landfill3.htm
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