Unit Title	Author
2021
Shining Star	Valerie Adams
Keywords: Carbon, carbon cycle, Chemical reaction, Electron, energy, Energy level, Photon, Photovoltaic, Solar, water, Wind
Humans and the Environment: How Water Pollution and Littering Affect Health	Chelsea Maher
Keywords: engineering, environment, Health, littering, pollution, urban, water, waterways, world
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
2011
The Extraction of Natural Gas through Hydraulic Fracturing on the Marcellus Shale Formation in Pennsylvania	John DiFiore
Keywords: geology, marcellus shale, natural gas, water