Lead in schools
https://www.epa.gov/ground-water-and-drinking-water/basic-information-about-lead-drinking-water#:~:text=Even%20low%20levels%20of%20lead,Slowed%20growth
https://www.epa.gov/dwreginfo/lead-drinking-water-schools-and-childcare-facilities
https://www.gao.gov/products/gao-18-382
https://www.epa.gov/sites/default/files/2015-09/documents/report_lcmr_schoolssummary.pdf
https://www.cdc.gov/nceh/lead/prevention/sources/water.htm
Hydroponics
https://vhhydroponics.com/hydroponic-garden/
https://healthyeating.sfgate.com/advantages-hydroponic-vegetables-2161.html
