Unit Title	Author
2022
How Coal Changed Philadelphia: 1820-1865	William McGeehan
Keywords: antebellum Philadelphia, Coal, industrialization, ironworking, locomotives, mineral energy, nativism, poverty, social reform, steamships, textile mills, water pollution, whiteness
2021
What Happens After the Water Leaves the Sky?	Aisha Kittrell
Keywords: stormwater, storm drain, run-off, hydrologic cycle, the water cycle, water filtration, water quality, water pollution
Environmental Health in the Classroom	Kimberly Sweeney
Keywords: conservation, contamination, plastic pollution, water pollution, water cycle
Freshwater In Our World: Philadelphia’s Freshwater Supply and the Role We Each Play in its Future	Phyllis Hurwitz
Keywords: climate change, distribution of water, philadelphia middle school science, impermeable sources, hydrologic cycle, water pollution, water, urban watershed
Where Does Our Water Come From?	David White
Keywords: Watershed, water pollution, water filtration, water cycle, water