Endnotes:
1 https://www.epa.gov/students/lesson-plans-teacher-guides-and-online-environmental-resources-educators
2 https://www.cocorahs.org/
3 https://ideagalaxyteacher.com/surface-area-activities/
4 https://www.chicago.gov/city/en/depts/water.html
5 https://www.chicago.gov/city/en/depts/water/supp_info/conservation/whatcanido.html
6 https://www.chicago.gov/city/en/depts/water/supp_info/conservation/green_design.html
7 https://www.chicago.gov/city/en/depts/water/supp_info/conservation/permeable_alleys.html
8 https://www.chicago.gov/city/en/depts/water/supp_info/conservation/downspout_disconnection.html
9 https://www3.epa.gov/npdes/pubs/nps_urban-facts_final.pdf
10 https://www.rivernetwork.org/our-work/clean-water/best-practices/managing-urban-runoff/
11 https://sites.google.com/a/owu.edu/water-runoff-in-urban-areas/water-cycle/harmful-effects
12 https://www.un.org/en/development/desa/population/publications/urbanization/urban-rural.shtml
13 https://www.chicagotribune.com/news/breaking/ct-met-chicago-flooding-basement-sewage-20190506-story.html
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