GreenTreks Network (GreenTreks.tv) created this video for the Philadelphia Water Department (PhillyWatersheds.org).
Learn more about preventing stormwater runoff on StormwaterPA.org.
Get free educational lessons for this video via our EcoExpress.org program.
Loading more stuff…
Hmm…it looks like things are taking a while to load. Try again?
TM + © 2015 Vimeo, LLC. All rights reserved.
Made with k in NYC.
Your content preferences apply to any Vimeo videos you view. Learn more about content preferences in our FAQ.