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: hydrologic cycle, run-off, storm drain, stormwater, the water cycle, water filtration, water pollution, water quality
Environmental Health in the Classroom	Kimberly Sweeney
Keywords: conservation, contamination, plastic pollution, water cycle, water pollution
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, hydrologic cycle, impermeable sources, philadelphia middle school science, urban watershed, water, water pollution
Where Does Our Water Come From?	David White
Keywords: water, water cycle, water filtration, water pollution, Watershed