BoundaryStones: A historical example of the importance of #CleanWater: #WashingtonDC had filtered water for the first time in 1905, leading to a significant drop in typhoid cases over the next few years. https://t.co/QZJ29Q2FD4
— Kenneth Samson (@PangurBanC) Oct 2, 2021
from Twitter https://twitter.com/PangurBanC
October 02, 2021 at 02:48PM
via PangurBanC
https://linktr.ee/samsonkg
